the ui of juxt is much different than the original miiverse, (mainly the accent color being purple instead of green) and the community has dwindled to a few people who are hardly online. roseverse is supposed to be much closer to the original ui & there are some other things...

its much closer to the original miiverse while having new features and bringing miiverse features back to games

...that it does better. (of course this is all speculation, and is probably inaccurate. i suggest you do your own research.)