Okay, here's an informal take:
AirPods Pro get better battery when connected via USB-C.
Discounts are a thing across Apple’s AirPods lineup if you know where to score them. The new Maxes, the fourth-gen AirPods (standard and ANC versions), and recent AirPod Pros themselves often have deals going on. You can even usually find discounts for the original AirPods Pro with all-day listening battery.
Check out places like Swappa or ZomEmazon frequently if you're watching sales for AirPod compatible ac