Excellent question, I think you will find that no two judges will do it exactly the same way. I can only speak for myself, as a judge.
If you put three products in your box I feel that you, as a cook, want all three products judge as presented. If you have two 9s and one product that is a weak 8....sorry but that's an 8 in my book. Now if it's a strong 8 and the other two are solid 9's, I'll give you the benefit of the doubt and score it a 9.
With that said, if a cook puts pulled or chunks of pork and two MM, I'll try both MM also and they better both be cooked correctly. The cook must have wanted them both judged or he wouldn't have put both in there.