XL2546/K Vs. Alienware AW2521HF/A input lag

[phaze]

Hey there,

I have both monitor at the gaming house, and I wonder which one has lower input lag, I feel like the Alienware without the freesync enabled on the OSD has less input lag and very much responsive and cleaner than the BENQ, besides benq doesn't have good timings on some resolutions including the native one, its just weird, it doesn't feel smooth and crisp as the Alienware, but came across lots of articles including RTings, they say the XL2546 has less input lag, so I wanna know why does my BENQ feel so bad and which is actually better for VALORANT/CSGO?

EDIT: also Display scaling on the alienware is much way better than the scaler in the BENQ monitor!