Is there any comparision with Nicehash miner, for example. Is it more profitable? It should be enough more profitable with 3% including fee
You wanted a comparison - you got one..

Go to
https://www.screenleap.com/winminer to see, live, two practically identical machines, each with Sapphire rx580, one running WinMiner and one running NiceHash.
Enjoy!
(Not sure how many users can watch this at the same time or how stable the broadcast will be...)