diff --git a/uutlSetHelper.inc b/uutlSetHelper.inc
index 8e76f86..fadf6d0 100644
--- a/uutlSetHelper.inc
+++ b/uutlSetHelper.inc
@@ -6,6 +6,7 @@ public
   class function TryToSet(const Str: String; out Value: __SET_TYPE): boolean; overload;
   class function ToSet(const Str: String; const aDefault: __SET_TYPE): __SET_TYPE; overload;
   class function ToSet(const Str: String): __SET_TYPE; overload;
+  class function Compare(const aSet1, aSet2: __SET_TYPE): Integer;
 end;
 {$ELSEIF defined (__SET_IMPLEMENTATION)}
 
@@ -64,6 +65,22 @@ begin
   end;
 end;
 
+class function __SET_HELPER.Compare(const aSet1, aSet2: __SET_TYPE): Integer;
+var
+  i: __ENUM_TYPE;
+begin
+  result := 0;
+  for i := High(i) downto Low(i) do begin
+    if (i in aSet1) and not (i in aSet2) then begin
+      result := 1;
+      break;
+    end else if not (i in aSet2) and (i in aSet2) then begin
+      result := -1;
+      break;
+    end;
+  end;
+end;
+
 {$ENDIF}
 {$undef __SET_HELPER}
 {$undef __SET_TYPE}