head-to-head feature comparison, but has the huge edge of being MUCH cheaper and a much lighter skin (altho the word is that lollipop touchwiz will be less over-the-top)
if money is no object, i'd get a note 4 (or nexus 6); if you want a 90-95% just as good phone at half the price, go for the oneplusone (if you can actually get it; my biggest beef)
or get an unlocked lg g3 (what i ended up doing); also much cheaper than Note 4 (can get it for like $450 on amazon), but pretty much a direct peer across all the specs