I had to anwser this same question when I was getting a new pc a week ago. I picked the 1070. That being said with the price cuts on 980ti now 400-450$. If your going to oc the card as of now. A after market OC 980ti beats a oced 1070 FE. Stock the 1070 is better but for a few games doom, Division, Etc. If I had to buy right now and i could get a 980 ti for 350-400 I would get the 980 ti, because I'm going to oc it. really depends on the price and what the aftermarket 1070 have to offer. The 10x series does not seem to be as good overclockers as maxwell thou.SOOO
Stock =1070
OCed 980ti till we see aftermarket 1070 results