I believe the ADS calculation of destiny 2 to kovaaks is incorrect.
The maximum ADS sensitivity in destiny 2 isn't even possible in Kovaaks. 5 sensitivity in destiny 2 is 0.5, which is multiplied by the Hipfire sensitivity. Somehow in kovaaks this is 0.35, which is 0.35 multiplied by 1 or whatever your hipfire sensitivity is.