in a condensed 66 game season i have a feeling the knicks will have a better record. they have more impact young guys and their 3 best players are in their prime (under 31). i think a condensed season tends to favor teams with multiple potent scoring options, and that means the knicks have an advantage. it's harder to play good team basketball and find guys who are open when everybody is tired. conversely, easier to take advantage of tired defenders if you have really good one-on-one scorers. amare / melo will win quite a few games by themselves (same applies to LeBron / Wade).
in the playoffs, im not so sure who will be better. health may determine that question more than relative talent on either roster, though.