Not saying fair. Superior. What software does your miner run? BFGminer or CGminer? Who created it? Questions you should ask yourself. From personal experience, kano is superior! Do what you want but kano and ck are the best options you have. No questions asked. (but if you do have a question, they will answer them again.!)
I'm running an S5.So, I don't know the answer to your question: the s/w is whatever is on the miner.
Why is kano superior? This is the question I'm asking
I choose slush with vey little information to go on based on a compromise of size vs block solutions (not really relevant as bigger payouts come less frequently with smaller miners and vice versa), their interface (dashboard), and support for noobs like me.
Bitmain uses cgminer. Try kano, whom happens to be one of the developers, and you won't regret it. As far as your earlier question about %, no kano is not 100%, we are over 105% overall. Try to find a pool that can beat that
!