Great, thank's to everyone for the info.
To summarize:
AMD RX 560: 0.50 MH/s
Nvidia 1050: 1.28 MH/s
Nvidia 1060: 2.25 MH/s
Nvidia 1070: 3.62 MH/s
Nvidia 1080TI: 5.60 MH/s
So Nvidia has more effective than AMD on hashrate mining. I have just ordered AMD RX 470 FXF. Dont know mine exactly. What a shame!
AMD Rx 470/570 can get about 1.45 Mh/s - AMD Rx 480/580 can get about 1.7 Mh/s on the Xevan algorithm in our experience.