CSound is akin to a badly written assembly language for audio synthesis and processing.
SuperCollider (or more precisely, SClang) is more like Lisp for audio synthesis and processing.
One important difference is that the designer of SClang understand roughly 1000% more about programming languages than the designer of CSound (who was a visionary person, but who really didn't understand programming languages).
CSound is akin to a badly written assembly language for audio synthesis and processing.
SuperCollider (or more precisely, SClang) is more like Lisp for audio synthesis and processing.
One important difference is that the designer of SClang understand roughly 1000% more about programming languages than the designer of CSound (who was a visionary person, but who really didn't understand programming languages).