User blog comment:MisterWoodhouse/The first migrations to the Unified Community Platform/@comment-29708202-20200723040530/@comment-1038387-20200724121657

That's because Miraheze runs on vanilla MediaWiki, 1.34. So of course it's superior to Legacy, which runs on Forked 1.19.

UCP brings Fandom up to the main stable release, 1.33. Any other "superior"-ity is subjective.