The 15 Pro Max is the most comfortable and premium phone I’ve had, and I had the 11 Pro -> 13 Pro -> 15 Pro Max for my last 3. Going from a 15 to 11 Pro Max would be an upgrade for screen size, and one extra camera, albeit with worse image quality on all three lenses. To each their own, but if you’re comfortable with the size of the 11 Pro Max, the 15 Pro Max is negligibly larger, lighter weight, and as comfortable to hold thanks to the newer rounded edges. Not to mention a big upgrade everywhere else. And an upgrade across the board from the 15.