well first the translation is better, the game is uncensored and in this case it helps the scenes A LOT and the game has the scenes that were added in the latest version, if you played the game just as it was released you didn't see them
some thoughts on the steam version: the description in the store is wrong, this game doesn't happen right after the first one, 3 to 4 years have passed, Rui Graduated and is college age, the description makes her seem like she is still highschool which is a red flag for steam sometimes lol.
The translation is very good, they took a few liberties like Nano calling herself a weeb, i think its a bit weird that the world she comes from developed the same slang as ours lol, still the translation helps a lot to understand the story and the writing so im thankful for it.
Its not the perfect version it still has some bugs, like sometimes text will say you recovered 7mp and you recovered 3 or the clothes in the post-game are buggy sometimes but that already happened in the japanese version.
Anyway this game is a 10/10 for me, i would recommend it to anyone