I loved both.
If I have to chose, I would say 90s was better
However, both are different shows
90s is a straight superhero cartoon, with some interesting themes and really cool adaptations, albeit with a twist, while evo is down-to-earth, almost slice-of-life type of story. evo was a little more boring, and sometimes cringey, but overall, it had a heart. I didn't like spike and x-23, though, and there were better characters to chose, rather than creating OC.
what everyone thinks of Pryde of the X-Men?
https://www.youtube.com/watch?v=ykK4sAHkvzw