Difference between Kovaak's and Apex sensitivity setting?

[dyllan.duran]

If both games use the source engine's setting for aim sensitivity, when using the calculator, why do the outputs differ from each other? They should be the same, no?

I'm using an Air 58 with a CPI at 420 DPI, with a 40.64 cm/360 (16 in/360).

Kovaak's output: 2.2729684.
While Apex's output: 2.435065. 

I'm using 80 FOV for both at Horizontal 4:3.

Am I missing something? Can someone please explain the discrepancy? Thanks

 

Edited March 3, 2019 by dyllan.duran

[DPI Wizard]

Apex sensitivity in Kovaak's is incorrectly affected by Hdeg Res FOV, while Apex is in fact unaffected.