I had the same thoughts, so bought all of them. Here are the comparisons on EWBF mining Equihash in my test rig. Hope this helps.

1080TI, 174W, 632 Sol/s, 3.63 Sol/W (Pwr limited to 60%)

1070, 147W, 460 Sol/s, 3.13 Sol/w Eff (Pwr limit: 100%)

1060 3GB, (Hyncrap) 109W, 300 Sol/s, 2.72 Sol/W (Pwr limit: 100%)

This is with Core +100 / Mem +500 running.