Need help to why i'm getting different sens calculations?

[senspekt]

[DPI Wizard]

FOV is the reason.

The default setting for Kovaak's is 90 Hdeg 4:3 meaning the 4:3 portion of your resolution is 90, wider AR will be added on to this, so 106.26 is the actual FOV for 16:9 and 100.39 for your resolution.

For PUBG the FOV is resolution based, meaning that it is actually 90 when you set it to 90. Also note that Simple Mode defaults to TPP for PUBG, which is locked to 80.

So in your first calculation everything is matches to Kovaak's hipfire with an actual FOV of 100.39, while in the second one everything is matched to PUBG hipfire with an FOV of 80, hence the different results.

If you switch to advanced mode and change the Kovaak "FOV Measurement" option to "Clamped Horz" and change PUBG to FPP  you will get the same result for both calculations.