compute capability ?

We know it very well, but I buy myself during the year a cluster computer with ryzen, but I hesitate between 4 GPU 1660 super or 4 GPU 2060, I do machine learning and as I read contradictory remarks, I am somewhat lost, so if I am told Turing = Turing and too bad for the Tensor Core optimized for Tensor Flow (which I use but not only …)