In reply to cgales:
Can you please explain which are effectiveness of test we are limiting here.
Rather I would suggest we should use hybrid approach. We can have a base test and override sequence with new sequence and made different testcase. Because I have observed that in most of the testcases what we change is sequence only. All code of test remain same. If we really want to add something extra in to base test we can make new testcase extending base test. It can help discarding extra testcase which may not be required.