I had only selected CryptoNight and Equihash to look at the differences originally, they both are deducting electricity cost just found it interesting that the 3x 1060s would pay out more than 1 1060 and 1 1070. Feel like I must be looking at something wrong.
Well, look, judging by this link
http://monerobenchmarks.info/, the difference between 1060 and 1070 (I'm considering adequate values) is 100-150 h/s. That is, there is no sense in overpaying for 1070 and you can a little tuned 1060. But the difference with the price is quite noticeable.
The main thing is to take a good PSU, with a margin.