I'm using bitmain's antpool and making more or less around what this (whitomine) is saying I should be making: https://[Suspicious link removed]/qxSFMq (3.4$/ day)
Just tried it out with nicehash 30 minutes ago, and indeed I'm 1$ short from the approximately 3$ that it can make...so it's significant if you look at it in %. Like 30% more.
Anyway, hope it helps. I personally just tested nicehash and www.antpool.com so far, so maybe there is something better. Hope anyone has any other feedback around this.