I've run a benchmark between three Zero pools for the last few days:
Suprnova, Community Pool, Forgetop.
I had a 480 gpu run in each pool and mining started at the same time.
Since the three cards had slightly different hashrates, I added a column with "normalized" results corresponding to a hashrate of 10S/s per card.
Here are the results:

Thanks for sharing, what settings do you use to get 12.2 S/s on XFX?
(I mine zero on Suprnova with 1 armor RX 580 8 Gb at 1366 core / 2175 mem and 1 GTX 1070 @ +120 core +500 mem)
another question: on my RX, the number of S/s starts around 11, then goes down around 10 and I don't know why, any idea ? (the GTX doesn't do that)
thanks