2019 iPad 10.2" (128gb) vs iPad mini 5 (64gb) - which one to choose?
You can compare all the model's specs from this page: https://www.apple.com/fr/ipad/compare/

It depends mostly on your budget, but I'd take the 2019 iPad for the wider screen which is better if you play and read a lot. You can connect an Xbox controller on both iPad, and they have the same battery life.