iPhone XS vs. Pixel 3: Which phone has the best camera?
https://www.cnet.com/news/iphone-xs-vs-pixel-3-which-phone-has-the-best-camera/
Read CNET's reviews of the Pixel 3 and iPhone XS here.
It's called HDR+ or HDR+ Extended on the Pixel 3, while the iPhone XS has Smart HDR. Both work in similar ways, by combining multiple exposures to boost the dynamic range of your photos.