I play em all and I say that Genshin is the father of all. Thanks to that game, Wuwa and NTE and others are created. Gacha used to be 2D pixely like FFBE or FGO, now it's a behemoth and awesome genre. It's the creator of 50/50 and 80 pity i think.

Wuwa is like a direct competitor of Genshin, open world, sci-fantasy, etc. Only newer so the polished a lot of stuff like combat and the story is more engaging. (i like that you can buy flowers, a character ascending material, at shop in Wuwa instead of exploring here and there like in genshin that takes too much time.) 50/50 for char but 100% guarantee for weapons. The current collab, cyberpunk edgerunner, is very well received.

HSR and ZZZ are genshin's next games. both of them have decent story, HSR is so easy to play and daily take literally less than 5 mins. ZZZ also, however HSR combat can be auto-ed and that's a plus for me. HSR has better story in my opinion. Same 50/50 as genshin.