IMO you should stick to the OS that you’re most comfortable with for mining. If you were agnostic, I’d pick Linux as there’s both more collaboration (SA is open source) and competition (now w/ Optiminer). Linux is easier for me to script with and SA stability has been great.
FWIW, Claymore v4 on my 470 dev system had a day where it blew away SAv4 - 72 S/s vs 44 S/s (60% faster for Claymore), but SAv5 brought that up to 70 S/s (it came out ahead for me once CPU hashing and dev fee were taken into account) and SAv5.1 (w/ an additional nerdralph optimization) brought it up to about 77 S/s (10% faster than Clv4/post-fee). I’ve been testing out Optiminer which is 110 S/s post-fee, so about 40% faster than SAv5.1 and just under 60% faster than Clv4.
btw @garethtdavies you might want to link to Optiminer to the Linux list - it’s binary-only and rather finicky to get running, and no idea how stable it is, but it’s fast. I’m getting 110 S/s on an RX 470 after deducting the 15% devfee, which means it’s running at 130 S/s on a memstrap 1500 RX 470.