So you went from a device with very weak battery life to one that is comparable but lost one camera and speaker but gained a larger screen, higher refresh rate and thinness. I don’t think you even know what you want but permitting Apple to entice you with RDF. I was a iPhone 13 mini owner and it was a great phone minus battery life, it was usable with one hand and that cannot be said for the iPhone Air for most normal hand sized people.
Granted the mini didn’t have ProMotion but it wasn’t missed. iPhone 12 mini was one of the worst phones produced by Apple.