The thing you should be looking for is noise and load and idle temperatures when comparing two cards like that, because that is where the cards really differ. Asus has better overclocking ability in general, but in this case, since the coolers are reference, it won't make absolutely any difference to get any of the two cards.
Also, as in one of your other similar threads, I'd recommend the 980 instead of the Titan Black. It's simply not in value right now.