From what I’ve seen, 23u has a good 3 hours extra battery life compared to the 22u and it will run cooler. I think in regards to any of these phones, performance is gonna be great and negligible.
I prefer Samsung over pixels these days, mostly because I feel like Google has some flaws with software bugs and I’m not a fan of their new quick toggle menu compared to the older one that Samsung still uses. And I prefer good lock mostly just to move the clock back to the right side of the notification bar.
But if you prefer pixels phones, I think battery life will be on par with the last year snapdragon phones if not slightly worse