1660 ti vs 1070 ti

(1440p, 144hz) I have two used deals lined up and have about $240 to spend, the asus guy said he would do $250 + shipping and the EVGA guy said he would do $240 flat. I watched videos on the asus 1660 ti and as i’ve seen, it plays exactly like a generic 1070 ti with the 1070 ti getting a few...