mGBA's sound for GB/GBC is still inferior to VBA's. See these comments by the mGBA dev and others: https://www.reddit.com/r/emulation/comments/sdlxz8/so_in_202...

In any case, mGBA has nothing to do with VBA, so there's no reason why that statement would include it.

Personally, I've been using BGB for 10 years or so, and it's been great.