You don't even get qi2 on the 10a which was the only feature I was looking forward to. I guess the display is slightly better and it charges faster(?) But it's the same CPU so if you can get the 9a just get that.

https://store.google.com/magazine/compare_pixel?hl=en-US&toggler0=Pixel+10a&toggler1=Pixel+9a

I wonder if the 10's display is less prone to burn in. Mine already has some that's noticeable on blank images in less than 6 months. But I also use mine a lot in the car so I'm not the nicest to the display.