Preset K Balanced or Preset M Performance on 3090?

I am struggling with “low” FPS (~100-120) and 1%low (75-95) in Battlefield 6 4K using DLSS Preset K Balanced

I have already turned off or minimised all the GPU consuming settings and still GPU-Bound (CPU: ~80%; GPU:95%up).

I am wondering if Preset M Performance would help improving some FPS and 1%low. But seems like preset M is not good for 30 series.

What is your opinion on choosing preset K balanced or preset M performance for 3090? What is the improvement and trade off?

Thanks a lot🙏🏻