some regression comparison tests not expected to pass with this PR

autotest/test_testmodels_mf6.py

@@ -26,6 +26,10 @@
     "test014_NWTP3Low_dev"
 ]
 
+excluded_comparisons = [
+    "test051_uzfp3_lakmvr_v2_dev",
+    "test051_uzfp3_wellakmvr_v2",
+]
 
 @pytest.mark.repo
 @pytest.mark.regression
@@ -39,17 +43,20 @@ def test_model(
 ):
     model_path = test_model_mf6.parent
     model_name = model_path.name
-    excluded = model_name in excluded_models
+    exclude_model = model_name in excluded_models
+    exclude_comparison = model_name in excluded_comparisons
     compare = (
         get_mf6_comparison(model_path)
         if original_regression
+        else None if exclude_comparison
         else "mf6_regression"
     )
     dev_only = "dev" in model_name and "not developmode" in markers
-    if excluded or dev_only:
-        reason = "excluded" if excluded else "developmode only"
+    if exclude_model or dev_only:
+        reason = "excluded" if exclude_model else "developmode only"
         pytest.skip(f"Skipping: {model_name} ({reason})")
 
+
     # setup test workspace and framework
     setup_mf6(src=model_path, dst=function_tmpdir)
     test = TestFramework(