R6 sens is a little bit similar to bf4. The 20% sens in-game bf4 is almost the SAME as 14% in r6 using 400 dpi. (Multiplier= 0.02)
BF4(Hipfire)= 28.4987 cm/360º
R6(Hipfire)= 28.4988 cm/360º
BF4(ADS[x1.Not scaled])= 47.4979 | Uniform Soldier Aim= off
R6(ADS)= 47.4980 (put 50% ADS)
It's pretty similar without using a different multiplier other than default.
This found's with other sens. You just need to find the similar hipfire.
Of course i'm not using de same values of one game in the other.
400 dpi