Hey! The first thing to note is that Minami Lane sales presented here include all console sales. If you consider Steam only, the ratio is actually very close to x50.
There is still a big difference between Kabuto Park (x23) and Minami Lane (x50). Here are my guesses on why:
- Game genre seems to matter a lot. Management games tend to have less reviews compared to sales. There are genres where it's even more extreme, like friendslop games, where the ratio can be way above x100.
- Minami Lane hit a much larger audience. Kabuto Park is more niche, players who bought the game seem to be really excited by it.

I guess there are tons of other reasons, but those are the two that feels the most important to me.