Trust me, I wish I could find any direct comparisons online.

I've played Fish Game in the past, but I was a bit frustrated with some of it's mechanics, like how maintaining more than 3 tanks is so much of a chore that you can't actually have any time to stop and admire the tanks you made, or the fact that you can't instantly pick up any fish and decoration you want, and must roll for the correct shop constantly.

From what I seen so far, this seems to be more of a build-anything-you-want sandbox game while Fish Game, although still a sandbox as well, is more of fishkeeper life simulator where you actively have to care for your fish, expand your repertoire, and physically visit stores and hope they got what you need for, etc.

And also:
1. Which game has the better critter simulation? Like needs, breeding, etc.
2. Which game has the better critter behavior/animations? Like swimming patterns, body language, etc. This is pretty important to me, since there are far too many aquarium games where the fish barely interact with the environment or each other and they just don't feel believable at all. Not much of a point to put hours in scaping a pretty tank if the fish aren't lively and totally ignore it.

EDIT: Ended up buying the game already. If anyone else stumbles upon this and had the same predicament as I did, I gave a review: https://steamhost.cn/steamcommunity_com/profiles/76561198282532232/recommended/1611580/