diff --git a/src/ansys/motorcad/core/geometry.py b/src/ansys/motorcad/core/geometry.py
index 8f13d8e92..7662dd530 100644
--- a/src/ansys/motorcad/core/geometry.py
+++ b/src/ansys/motorcad/core/geometry.py
@@ -2083,6 +2083,10 @@ def __eq__(self, other):
         """Compare equality of 2 EntityList objects."""
         return self._entities_same(other, check_reverse=True)
 
+    def __ne__(self, other):
+        """Compare difference of 2 EntityList objects."""
+        return not self == other
+
     def reverse(self):
         """Reverse EntityList, including entity start end coordinates."""
         super().reverse()
@@ -2139,6 +2143,9 @@ def _entities_same_with_direction(entities_1, entities_2):
             else:
                 return False
 
+        if len(self) != len(entities_to_compare):
+            return False
+
         if check_reverse:
             if _entities_same_with_direction(self, entities_to_compare):
                 return True
diff --git a/tests/test_geometry.py b/tests/test_geometry.py
index 0a042f592..3e242d92e 100644
--- a/tests/test_geometry.py
+++ b/tests/test_geometry.py
@@ -509,6 +509,15 @@ def test_reverse_arc():
     assert arc == expected_line
 
 
+def test_entities_same_subset():
+    arc1 = Arc(Coordinate(1, 0), Coordinate(0, 1), radius=1)
+    arc2 = Arc(Coordinate(0, 1), Coordinate(-1, 0), radius=1)
+    ent1 = geometry.EntityList([arc1, arc2])
+    ent2 = geometry.EntityList([arc1])
+
+    assert ent1 != ent2
+
+
 def test_entities_same():
     region = generate_constant_region()
     region_expected = generate_constant_region()