Just simple measurement with two exactly same rigs (1x GTX1060):
Rig#1: NiceHash, Lyra2REv2, 22 MH/s: 0.00002431 BTC/hour = $0.15/hour
Rig#2: Zpool, Lyra2REv2, 22 MH/s: 0.000000576 BTC/hour = $0.0036288/hour
Its difficult to compare regular pools with Nicehash. Nicehash is paying you based upon what buyers have already paid in BTC.
Whereas Zpool would be mining coin, waiting for it to mature, and finally going to exchange to convert to BTC. Pretty long for returns to change from when you actually mined something.
I prefer Nicehash over everything, except MPH.