SE 2022 came in sooner than expected. Conveniently arrived with 17.5.1 installed, but feels pretty similar to iPhone 11 on iOS 18. Pretty bad strain after 15 minutes. So two separate LCD iPhones behave different on the same iOS version, cool. Again, maybe my 11's firmware was altered when updating to iOS 18. But then why does it feel better (but still worse than prior to updating to 18) on 17.6.1? Looks like I'm never making any sense of this, lol.
I updated the SE to iOS 18 just to see if there was a difference, there was none. Same strain.
Just bought a used mint iPhone 11 on 17.5.1. Fingers crossed it works just like my current 11 did before iOS 18. I'll never update it again and use it for as long as I can.