I definitely have a difference too but no exterior vs VC. It's just a good deal lower FPS all around. I have it in P3D V5 and I am getting about 25 FPS in and out with the 767 vs 35-40 with the another company Airbus A320. The biggest thing I notice is when switching views the textures turn all black and it takes a couple of seconds to load. I have a high end PC i7 9700k/ 2080ti and 32gb of RAM. I haven't tried the 2K textures yet, but just wanted to give the feedback.