diff --git a/src/App.jsx b/src/App.jsx
index 83f4807..7b23b63 100644
--- a/src/App.jsx
+++ b/src/App.jsx
@@ -1238,11 +1238,33 @@ function ProgramComparePopup({ programs, comparisons, onComparisonChange, onClos
   const rightProgram = programs.find((program) => program.id === rightProgramId);
   const comparison =
     comparisons.find((item) => item.leftProgramId === leftProgramId && item.rightProgramId === rightProgramId) ?? {};
+  const leftSteps = leftProgram?.steps ?? [];
+  const rightSteps = rightProgram?.steps ?? [];
+  const stepMatches = comparison.stepMatches ?? [];
 
   const updateComparison = (field, value) => {
     if (!leftProgramId || !rightProgramId || leftProgramId === rightProgramId) return;
     onComparisonChange(leftProgramId, rightProgramId, field, value);
   };
+  const createStepMatch = () => ({
+    id: `${Date.now()}-${Math.random().toString(36).slice(2)}`,
+    leftStepIndex: '0',
+    rightStepIndex: '0',
+    reason: ''
+  });
+  const addStepMatch = () => {
+    updateComparison('stepMatches', [...stepMatches, createStepMatch()]);
+  };
+  const updateStepMatch = (matchIndex, field, value) => {
+    updateComparison(
+      'stepMatches',
+      stepMatches.map((match, index) => (index === matchIndex ? { ...match, [field]: value } : match))
+    );
+  };
+  const removeStepMatch = (matchIndex) => {
+    updateComparison('stepMatches', stepMatches.filter((_, index) => index !== matchIndex));
+  };
+  const getStepLabel = (step, index) => `${index + 1}. ${step?.title ?? '-'}`;
 
   const renderProgramSummary = (program) => {
     if (!program) return null;
@@ -1298,7 +1320,13 @@ function ProgramComparePopup({ programs, comparisons, onComparisonChange, onClos
               <span className="text-[12px] font-black text-slate-500">비교 프로그램 A</span>
               <select
                 value={leftProgramId}
-                onChange={(event) => setLeftProgramId(event.target.value)}
+                onChange={(event) => {
+                  const nextProgramId = event.target.value;
+                  setLeftProgramId(nextProgramId);
+                  if (nextProgramId === rightProgramId) {
+                    setRightProgramId(programs.find((program) => program.id !== nextProgramId)?.id ?? '');
+                  }
+                }}
                 className="mt-1 w-full rounded-2xl border border-slate-200 bg-slate-50 px-3 py-2 text-sm font-extrabold text-slate-800 outline-none focus:border-blue-400"
               >
                 {programs.map((program) => (
@@ -1329,44 +1357,99 @@ function ProgramComparePopup({ programs, comparisons, onComparisonChange, onClos
             {renderProgramSummary(rightProgram)}
           </div>
 
-          <div className="mt-4 grid gap-3 rounded-3xl bg-white p-4 ring-1 ring-slate-100 lg:grid-cols-2">
-            <label className="block">
-              <span className="text-[12px] font-black text-amber-700">A에서 안 되는 기능</span>
-              <textarea
-                value={comparison.missingFeature ?? ''}
-                onChange={(event) => updateComparison('missingFeature', event.target.value)}
-                rows={4}
-                placeholder="예: 3D 형상 직접 편집, obj/ifc 포맷 변환 등"
-                className="mt-1 w-full resize-y rounded-2xl border border-amber-100 bg-amber-50/50 px-3 py-2 text-sm font-bold leading-6 text-slate-800 outline-none focus:border-amber-300"
-              />
-            </label>
-            <label className="block">
-              <span className="text-[12px] font-black text-blue-700">B에서 수행하는 기능</span>
-              <textarea
-                value={comparison.alternativeFeature ?? ''}
-                onChange={(event) => updateComparison('alternativeFeature', event.target.value)}
-                rows={4}
-                placeholder="예: 모델 방향 수정, 속성정보 입력, 포맷 변환"
-                className="mt-1 w-full resize-y rounded-2xl border border-blue-100 bg-blue-50/50 px-3 py-2 text-sm font-bold leading-6 text-slate-800 outline-none focus:border-blue-300"
-              />
-            </label>
-            <label className="block lg:col-span-2">
-              <span className="text-[12px] font-black text-slate-700">사용 이유 / 결론</span>
-              <textarea
-                value={comparison.reason ?? ''}
-                onChange={(event) => updateComparison('reason', event.target.value)}
-                rows={3}
-                placeholder="예: 사내 프로그램에서 해당 편집 기능이 없어 현재는 상용 프로그램을 보완 도구로 사용"
-                className="mt-1 w-full resize-y rounded-2xl border border-slate-200 bg-slate-50 px-3 py-2 text-sm font-bold leading-6 text-slate-800 outline-none focus:border-slate-400"
-              />
-            </label>
-            <label className="block lg:col-span-2">
-              <span className="text-[12px] font-black text-slate-500">비고</span>
+          <div className="mt-4 rounded-3xl bg-white p-4 ring-1 ring-slate-100">
+            <div className="flex items-center justify-between gap-3">
+              <div>
+                <h3 className="text-base font-black text-slate-950">스텝 1:1 매칭</h3>
+                <p className="mt-1 text-[12px] font-bold text-slate-500">
+                  왼쪽 스텝과 오른쪽 스텝을 연결하고, 가운데에 상용 프로그램을 쓰는 이유를 적습니다.
+                </p>
+              </div>
+              <button
+                type="button"
+                onClick={addStepMatch}
+                className="flex shrink-0 items-center gap-1.5 rounded-full bg-blue-600 px-3.5 py-2 text-[12px] font-black text-white shadow-sm hover:bg-blue-700"
+              >
+                <Plus className="h-3.5 w-3.5" />
+                매칭 추가
+              </button>
+            </div>
+
+            <div className="mt-4 space-y-3">
+              {stepMatches.length === 0 ? (
+                <div className="rounded-2xl bg-slate-50 px-4 py-6 text-center text-sm font-bold text-slate-500 ring-1 ring-slate-100">
+                  아직 매칭된 스텝이 없습니다. `매칭 추가`를 눌러 스텝을 연결하세요.
+                </div>
+              ) : (
+                stepMatches.map((match, matchIndex) => (
+                  <div
+                    key={match.id ?? matchIndex}
+                    className="grid gap-3 rounded-2xl border border-slate-100 bg-slate-50/80 p-3 lg:grid-cols-[minmax(0,1fr)_minmax(260px,1.35fr)_minmax(0,1fr)_40px]"
+                  >
+                    <label className="block">
+                      <span className="text-[11px] font-black text-amber-700">{leftProgram?.name ?? 'A'} 스텝</span>
+                      <select
+                        value={match.leftStepIndex ?? '0'}
+                        onChange={(event) => updateStepMatch(matchIndex, 'leftStepIndex', event.target.value)}
+                        className="mt-1 w-full rounded-xl border border-amber-100 bg-white px-3 py-2 text-[12px] font-extrabold text-slate-800 outline-none focus:border-amber-300"
+                      >
+                        {leftSteps.map((step, index) => (
+                          <option key={`${step.id ?? step.title}-${index}`} value={String(index)}>
+                            {getStepLabel(step, index)}
+                          </option>
+                        ))}
+                      </select>
+                      <p className="mt-2 whitespace-pre-line rounded-xl bg-white/70 px-3 py-2 text-[12px] font-bold leading-5 text-slate-600 ring-1 ring-amber-50">
+                        {leftSteps[Number(match.leftStepIndex ?? 0)]?.feature || '-'}
+                      </p>
+                    </label>
+                    <label className="block">
+                      <span className="text-[11px] font-black text-slate-700">안 되는 기능 / 상용 사용 이유</span>
+                      <textarea
+                        value={match.reason ?? ''}
+                        onChange={(event) => updateStepMatch(matchIndex, 'reason', event.target.value)}
+                        rows={5}
+                        placeholder="예: 이 스텝에서 3D 형상 수정과 obj/ifc 변환이 안 돼서 Rhino의 모델 편집/포맷 변환 기능을 사용"
+                        className="mt-1 h-[128px] w-full resize-y rounded-xl border border-slate-200 bg-white px-3 py-2 text-[12px] font-bold leading-5 text-slate-800 outline-none focus:border-blue-300"
+                      />
+                    </label>
+                    <label className="block">
+                      <span className="text-[11px] font-black text-blue-700">{rightProgram?.name ?? 'B'} 스텝</span>
+                      <select
+                        value={match.rightStepIndex ?? '0'}
+                        onChange={(event) => updateStepMatch(matchIndex, 'rightStepIndex', event.target.value)}
+                        className="mt-1 w-full rounded-xl border border-blue-100 bg-white px-3 py-2 text-[12px] font-extrabold text-slate-800 outline-none focus:border-blue-300"
+                      >
+                        {rightSteps.map((step, index) => (
+                          <option key={`${step.id ?? step.title}-${index}`} value={String(index)}>
+                            {getStepLabel(step, index)}
+                          </option>
+                        ))}
+                      </select>
+                      <p className="mt-2 whitespace-pre-line rounded-xl bg-white/70 px-3 py-2 text-[12px] font-bold leading-5 text-slate-600 ring-1 ring-blue-50">
+                        {rightSteps[Number(match.rightStepIndex ?? 0)]?.feature || '-'}
+                      </p>
+                    </label>
+                    <button
+                      type="button"
+                      onClick={() => removeStepMatch(matchIndex)}
+                      className="flex h-10 w-10 items-center justify-center self-start rounded-full bg-white text-slate-400 ring-1 ring-slate-200 hover:bg-red-50 hover:text-red-500"
+                      aria-label="스텝 매칭 삭제"
+                    >
+                      <Trash2 className="h-4 w-4" />
+                    </button>
+                  </div>
+                ))
+              )}
+            </div>
+
+            <label className="mt-4 block">
+              <span className="text-[12px] font-black text-slate-500">비교 결론</span>
               <textarea
                 value={comparison.note ?? ''}
                 onChange={(event) => updateComparison('note', event.target.value)}
                 rows={2}
-                placeholder="추가 검토사항이나 향후 대체 가능성 등을 적어주세요."
+                placeholder="예: 현재는 해당 스텝 보완을 위해 상용 프로그램 사용이 필요함."
                 className="mt-1 w-full resize-y rounded-2xl border border-slate-200 bg-white px-3 py-2 text-sm font-bold leading-6 text-slate-700 outline-none focus:border-slate-400"
               />
             </label>