I just went back and forth and tested between the two games, but I've played them both for years. The way I snipe in Destiny uses larger flicks, whereas widow is small flicks with good crosshair placement. Making large flicks in overwatch feels the same in terms of monitor distance as destiny, but that isnt the way I play widow. Small flicks in overwatch feel too fast compared to small flicks in destiny. The issue is on me I believe. I used your second link and adjusted all the values for my setup. 1080p 25in 105 fov destiny vs 103 ow 800dpi 4 sens 8 mod