https://www.cnet.com/news/iphone-xs-max-vs-galaxy-s10-plus-camera-comparison/

The XS Max has a dual camera setup on the rear with a telephoto and wide-angle lens as well, but a fixed aperture and a single, depth-sensing camera on the front.

General shots look stunning on both phones, with just slight variations in color temperature, contrast and brightness. Some shots from the S10 Plus looked a bit brighter, and others a bit darker and moodier, depending on what aperture it chose for that specific scene. The iPhone's shots look more consistent with a slightly cooler hue and more subdued colors. This category was tough, because the differences were so nuanced. For landscapes, I favored the bold look of the S10 Plus, but for people and objects I preferred the softer look of the iPhone. In most cases the better of the two really came down to personal preference.