The main difference between the iPhone 17 Pro and 17 Pro Max is the screen size (\(6.3\)-inch vs. \(6.9\)-inch), which affects the device’s overall dimensions, weight, and battery size. Both models share the same A19 Pro chip, camera system, and build materials, but the Pro Max offers about \(20\)% more screen space and a larger battery, leading to potentially longer battery life. The larger size of the Pro Max can be better for media consumption and multitasking, while the smaller Pro is easier to use one-handed.