The iPhone 13 PM and Pixel 7 Pro are on equal terms. It boils down to whether you prefer iOS or Android. The 7 Pro is a seriously good phone. Pretty much everything about it is solid. The only negative about the 7P is that the iPhone will always fetch more in a trade because of the brand.
This is a rare case where Google is actually offering more than the market value of the phone. They’re offering $950 for the 13 Pro Max and right now on Swappa they’re going for about $100 less after Swappa take their cut.