2024 VR performance, 4090 vs 5090 performance (issues) and 2020 vs 2024, big decrease?

Here is another comparable:

EGLC full install (orbx south, eglc etc) 2024: 2D at 4k: 60fps, VR 41
EGLC bare bones 2024: 2D 63 FPS, VR 48 peak

EGLC Bare bones 2020: 2D 84 fps, VR 74-77 fps (DLSS performance, 145 tlod, 155 buildings, 16x/2x, 1024/512 shadows, ambient low etc)

So basically eglc bare bones is 30 fps better in VR in 2020 vs 2024, either something is really amiss with my 2024 install or the drop is that high?

UPDATE: put in the 5090 oc windforce and there was ZERO change either in msfs 2020 or 2024, im completely baffled, it should be about 17 fps better in vr at least according to one review comparison unless it was flawed
. EDIT: 3dmark nomad seems good, 13999 at stock, so its not an issue with the card i guess.

UPDATE2: i used a test win clean partition and retried, i actually see an uplift of about 8 fps at eglc to 68-70 in 2D and an uplift of 10 fps from 48 to 58. **has 10 fps been the avg for those switching from 4090 to 5090 (og crystal at native res)?

I believe 10 fps is about right, 20+% increase