Benchmark found on Reddit:
Testing MSFS 2024, RTX 4090, Latest Preset 3840x2160 TAA with DLSS on and off. Will report back. Base line is 56 fps without any DLSS or FG
Tested on the ground at IniBuilds KJFK, TLOD 200, OLOD 200, Fenix A321, 591.74, 55" LG QNED 4k TV
Baseline TAA with no DLSS or FG = 47 fps
DLSS Quality with no FG = 63 FPS
DLSS Balanced with no FG = 63 fps
DLSS Performance with no FG = 63 fps
DLSS Ultra Performance with no FG = 70 fps
DLSS DLAA with no FG = 43 fps
DLSS Quality with FG = 105 fps
DLSS Balanced with FG = 107 fps
DLSS Performance with FG = 115 fps
DLSS Ultra Performance with FG = 120 fps
In terms of quality of the screens:
DLSS standalone no FG = Very close to 1:1 screens with TAA
DLSS with FG = Slight Ghosting of rapidly changing numbers on screens, better then before, Quality and Balance presets are usable and still good.