In a situation like that I would have to closely scrutinize their fights and see who executed there game plan better, based on the descriptions you gave, I would personally give it to the defensive fighter, that's just my taste.
Overall I rate fighters on the following.

1) How well do they execute their individual style
2) How does that style match-up with others in their weight class
3) General conditioning, and chin
4) Willingness to use all above said in worthwhile match-ups