What's the typical ROI on these cards? Are they worth getting over then rx480s?
A 1060 6gb with Samsung RAM does around 0.125 Eth/month. That is about 32 USD/month after deducting electricity. Non Samsung does around 0.1 Eth/month and probably bring in about 26 USD.
I calculate something like ~7 months for 3Gb ~9 months for 6Gb for Samsung, 9-11 months for non Samsung.