Atmospheric performance hit Flatscreen vs VR

I notice that enabling/disabling Atmospheric effects in Developer Mode has little or no fps impact in flat screen mode, but a huge impact in VR mode (10-15 fps).

Have anyone else noticed the same thing? Thanks.

MSI MPG Z970
Intel I9 14900K
MSI nvidia RTX 4090 24GB
Corsair Dominator Titanium 2x16GB DDR5-7200
MSI MEG Ai1300P
Pimax Crystal Light VR headset
MSFS 2020 1.37.19.0 (MS Store)

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