none of them, this is a universe where these games successfully compete without pushing the other away or too much convergence in styling and mechanics
it is also a universe where polaris chord, reflec beat, chrono circle, tetote, music diver, diva, groove coaster, and more are doing fine
wacca is no longer being updated (officially), and is no longer (officially) online. it released during peak covid and also wasn't very well liked (in regions where it officially released) outside of north america. there are fan projects and people who chart for it, but officially, it is dead.
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it is also a universe where polaris chord, reflec beat, chrono circle, tetote, music diver, diva, groove coaster, and more are doing fine