I kind of have the same question. I don't know what dictates which version of Cuda to download. If you have say a GTX 1070 will any Cuda versions work or is there a particular one you need to download and run, and if so why that particular one?

Just for a benchmark I'm running two rigs each with a EVGA 1070 and a MSI GTX 1050ti and getting 650ish Sol's (450 on the 1070 and 185-190 on the 1050ti). 1070 is set to 65% power limit, 75 core clock, 100 mem and the 1050ti is at 80% power, 150 core and 200 mem.

I have two 1070's and two 1050ti's and everytime I look them up on whattomine it shows ZCASH as being more profitable than ETH. Hell, even Zclassic shows it as more profitable than ETH.

Can I ask why everyone is mining Zcash instead of Zclassic? Every time I run whattomine it shows Zclassic yielding about $3 a day more with my two GTX 1070's and my two GTX 1050ti's. Is it because the miners suck or there are no good pools available?
Thanks for the reply.