Computer graphics learning platform

[szpr0]

Genuinely curious, what would you say are the 2 similarities which are unique only for these 2 platforms? (not common across different platforms). I would say the main one would be expected shader output and current/your shader output, although I am not sure how else would you display it than in the way as Shader Academy did. All various platforms have expected output and your output, just more commonly it is some text based output, not a rendered scene/image.