The Verge thinks Pixel 2 > XS > S9 >> X
https://www.theverge.com/2018/9/18/...-xs-max-review-camera-processor-battery-price
The camera upgrades on the XS over the X are significant — the XS makes the X camera look terrible most of the time. But we’ve been saying the best smartphone camera on the market is Google’s Pixel 2 for a year now, so that’s the standard to beat. And… I think the Pixel 2 still has a better camera than the iPhone XS. Don’t get me wrong — most people are going to like the photos they get out of the iPhone XS. It has a solid camera, and I prefer it to the Galaxy S9. But compared to the Pixel 2, the XS doesn’t really do it for me.