BC7 is a modern format who is supported on both D3D11 and OGL4.
He is the best of the best, and for that he needs a compute shader to convert because he is complex.
The difference is huge, it's why he is the best of the best, here some pictures to compare:
As you can see, the quality of BC7 is very good and all know good texture quality is a need.
Now the question is other format than BC7 is needed nowadays ?
BC7 works well on RGB and RGBA.
Thanks to answer
Edited by Alundra, 16 March 2014 - 08:13 PM.