Maria is slightly better than Rosemi simply because:
>she's not afraid to tardwrangle the chat or to set the boundaries
For example every now and then people complain that she streams at late NA times and she always kindly and calmly explains that timezones exist for a reason and that they should prioritize their health/sleep, she outright tells people to watch vods instead of staying around at times. She also tard wrangled chat when they kept asking for roomie to appear on stream.
>better singer, more involved in music stuff
One cover per month is her goal, she released Godish, now Roze maiden, she takes singing lessons and actively wants to use nijisanji to produce good music and improve as an artist
>hard working
schedule and waiting rooms always on time, does her own assets for some streams (game show, asmr), involved in solo and group projects (voice packs etc)
>outgoing
she has no problem approaching people in collabs and is loved by everyone, especially Yugo, Ren, Pomu and Petra
>appreciates the audience but doesn't pander
as i've said she can tard wrangle but never acts in a hostile way, always stresses how important the audience is but doesn't feel like someone just saying that for brownie points
>has clear goals
she wants to sing and produce music, make friends in nijien and have comfy streams, she wants to be the girl next door you hang out with whenever you have time but also don't feel like you are missing out because the vods are always there. of all streamers she seems the most neutral, she doesn't chase her audience but also doesn't do anything to antagonize them, she just keeps doing her own stuff knowing someone will appreciate it. that makes me respect her a lot because most chubas are numberfags chasing for another viral idea or short to boost their numbers.
Overall enjoying Maria over Rosemi is subjective, some people hate her game choice or whatever but objectively speaking she's way more genuine, transparent and "complete" as a person and streamer compared to Rosemi. Don't want to shit on Rose too much but she really doesn't feel like someone who wants to stream and just happens to be there because she got into Nijisanji. When you contrast her with Maria it becomes pretty evident.