>Mori
insane pace of pumping out songs, more misses than hits. Streams.
>Marine
Glacial pace all with high production MVs, all hits. Occasionally streams.
>Suisei
Orisongs bundled in albums, slower than Mori faster than most holos, more hits than misses. Occasionally streams.
>Kiara
Decent pace with well thought out MVs, even the covers. Streams alot.
>Okayu
Many songs sprinkled through the year, you wont notice it until you actually count her number songs and realize she's very productive. Streams.
I think these are the distinct styles of releasing songs, and these 5 are archtypical examples that other holos can fall into the category (except Marine, she's literally the only one). I don't want to compare at all since these types aren't inherently better than the other, but I just want to write this down since I do want other ENs to be more musically active and gravitate towards any of these. And among them I prefer Kiara's style because all her songs are an "event" to celebrate and still keep up, but not slow enough that it literally happens once a year. And so far, only Bae seems to fit the potential to be another Kiara in regards to music.