I'm not sure I could deal with the lower specs
To be honest, I think the only one that matters is the cameras, primarily the lack of a zoom lens. The performance is excellent unless you want to do things like Switch or PC emulation (in that case, the OP13 is a no brainer, why are you even considering the Pixel). I also just think the modularity and repairable aspect of it is so awesome!
PostmarketOS is tempting for the future, but it looks like it would need a bit more work until we get there.
And you'll be keeping the phone for a long while, so something that also supports pmOS (like the Fairphone) could make it useful once it is no longer receiving Android updates!
I am moving to Piefed at scallisto@retrofed.com (https://retrofed.com/u/scallisto)