If you can afford the 1070, get the 1070. In this instance, "more" is "more" and you'd be sorry very soon if you settle for the 1060 when you could have gotten the 1070. I would rather max out a 60hz monitor (which I have as well) and have more horse power in the bank if I either upgrade monitors OR start playing more demanding games. If that 1070 can drive 80FPS, you'll only see 60 smoooooth ones... but if that 1060 can only drive 45, then 60, then 52, then 60, then 38 frames.... you will see those.
Get. The. 1070.