matching sensitivity. From 24" to 15.6" monitor

[Roadkill0000]

Hey all.

I play Overwatch @ 103 fov, 1920 x 1080. On a 24" monitor ( actual screen size not known, this is on a MG 248Q 144 hz , just says 24"

800 dpi, 4.5 in-game sens

I want to transfer this to my laptop which is 15.6" ( actual screen size now known... 2021 Flagship Lenovo Legion 5 15 Gaming Laptop 15.6" FHD IPS 240Hz )

When I make the sensitivity / aspect ratio / fov / etc, all the same.. the sensitivity is not even close...

Anyone know what I should set my 15.6" laptop in game sensitivity to? My mouse I don't believe I can adjust dpi in small increments, but in game sens I can change. 

Thank you!