Yes afraid so, when I use H1Z1 for example @ 400dpi a sensitivity is 0.146289 produces a 18" 360, using that and converting it to DayZ SA it comes out at 0.35305556. Which is the same value as if I did a distance calculation. But 0.35305556 does not produce a 18" 360 @ 400dpi in DayZ SA
Measuring manually it comes out more like 0.38 ish. I actually don't think DayZ's mouse irregularities are behind them either to be honest so it can probably just be put down to that as well.
I will double check all the above just to be certain.