The Pixel has better color accuracy. The iPhone 13 has better light gathering. Neither look very good when compared to an Full Frame, APS-C, or even a 1” camera though. The iPhone is way over processing and turning up saturation too high and pushing a gawd awful blue tint. The Pixel looks washed out and dim. And this is why I rarely take anything but throw-away photos with my iPhone! A tiny camera is always going to be a crappy camera. If you want keeper photos, buy a good camera without a phone attached to it.