No this doesn't work. This can easily be disproven by counter example.
If we took CS:GO hipfire-> PUBG hipfire
if we used viewspeed with my settings you'd get a sensitivity of 0.005019, which lines up with MDH (16:9) 74%
if we took CS:GO hipfire -> PUBG 6x
if we used viewspeed with my settings you'd get a sensitivity of 0.004405, which lines up with MDH (16:9) 71%
So rather than following this ratio you suggest, viewspeed just floats around ~70% MDH horizontal 16:9 at these settings as a simple explaination