I was able to test before buying and the difference was only in eth (memory size)
I tested GTX 1050 2GB @ 80~90 MHs only 54C, half price.
This week is coming GTX 1050 Ti 4GB to test LBC,no more RX boards to buy the way is to run to nvidia here
I think 1060 3GB and 6GB have also differences in core, at least the wiki says it...
I saw youtube video with 3GB and 6GB versions that 3GB has 175MH/s and 6GB has 200MH/s :/
I've bought the Aero ITX version from MSI for $240 plus they have cashback almost $20. I couldn't find better prices here in CZ :/