It's an 8 plus. The other photo was from a first-gen Pixel XL.

The photos I take with my phone look great on the phone unless I zoom in at all. I'm always surprised how quickly the effect becomes noticeable. Even the slightest amount of zooming in on the phone makes it apparent. You know how you can double-tap on a photo to zoom in to a preset level? At that level it's unavoidable.

I'll try another app for RAW. I have Camera+ installed.