I can see a reason to get either a pixel or Samsung, can't really go wrong with either. Personally I use a Samsung for the customization of OneUI and better processors but occasionally I do envy the camera on a pixel phone and the stock android layout. Main advice if you were to get either is to try to buy it used instead of new.
Samsung has a set of tools called good lock, where you can customise OneUI with such ease. The only thing I miss about my pixel is the weather and which song is playing on the AOD screen. Now samsung allows widgets on AOD buts it not the same thing.