Got it, Amoxom has called it, This is FOV where the XSP has 108deg and the P3P has 94deg. If your comparison pics were taking from the exact same spot, etc. (you're one street back on the xcurve image) you could overlay and make a quick .gif to see what the extra FOV gives you in comparison, but at the cost of a curve with some down gimbal. Autel made a decision and a decision never pleases everyone. With a level or just a couple down degrees of gimbal, the 108 FOV will give you more scene in your shot and not cost you a curved horizon. The 94 FOV won't cost you a curve with more down gimbal, but you will get less scene in the shot.
My personal tastes are level for landscape because more often than not, the sky is as important as the land in the shot for me and we're not going so high in the air that I need to down angle to get enough land. However, your tastes are specified a bit different for landscape shooting and want more land, therefore higher FOV's will cause you grief for corrective steps.
I like others I know are on pins and needles waiting for word on what Autel will offer on modular camera upgrades, it's freaking killing me waiting for word. I'm hoping they are going to skip the expected minimal upgrades, like a digizoom and go after optical zoom and different FOV/focal length options. We don't have much extra weight to play with, but I believe the cam I want will be able to work with the bird.