Playerbase maybe CF still higher, when they do hit 1M+ in concurrent while CS if you based on three PW servers the recent peak was 177k in december 2020
China scene only also CF. Well CN CF is a Franchise league with $1.5M Entry Fee that bundles a Mobile league and HD league spot together for 1-time buy, that would say a lot
Streaming wise CS has surpass CF

Its a sensible reason for CNVAL that they would be compared by CN netizens with CF instead of CS
much like how in Korea it was Sudden Attack.

So those two has its own lead
CF for being 15 years old, but loses on Streaming and International Comp
CS for more preferred on streaming and International Comp, but loses out on Domestic Comp in China