Need to do a little more testing (at 1440p) but I'm showing a 40-45fps hit. Custom mission with same static aircraft in the same location on both the Stennis and the Roosevelt. Both carriers are on the same map out of sight of each other. In the Hornet running looking back from cat 1 at the tower. It's a FPS hit but still playable since I usually play at 1080p. High textures, water, visibility. Medium & Flat Shadows. 2x MSAA, 4xAO. The statics I used was the F/A-18A, F-14A and the E-3. 14 total on deck and 2 tugs near the tower. No NPC traffic.
Stennis: 116fps
Roosevelt: 71fps