>>55300368holoen got there first, and haven't done anything to squander that early lead, that's p much it.
also their shtick of being unicorn-friendly appeals to the average weeb more than niji's brand of putting entertainment over parasocialism.
the talents are pretty much equal in quality, in fact i'd argue that niji has more quality talents, but they also have way more garbage talents that drag the company down whenever they show up to a collab. pomu is infinitely more entertaining than anyone hololive has, even in the JP side, but her insistence on collabing with shitters like kyo and luca makes a lot of her streams unwatchable. do this long enough and a lot of your regular viewers will start to drift away from lack of worthwhile content.
in terms of management holo management definitely supports them more. it's pretty rare for holos to have projects rejected or canceled, and management will work with them to get whatever they want done. it really helps to boost hololive's brand that they always have cool stuff cooking behind the scenes even when half their branch are lazy and don't stream. their management clearly cares a lot about them.
meanwhile niji management has made pomu cry on like 5 separate occasions for entirely different reasons because they're just that garbage. it's like they go out of their way to punish anyone who shows an ounce of creativity or ambition because that means more work for them. fucking assholes, she deserves so much better.
