In CS:GO, 80% of all shots require some level of recoil control.
DyAc™ /DyAc+ ™ is a technology designed by ZOWIE to reduce motion blur seen in LCD technology. It reduces vigorous screen shaking in-game and can help improve recoil control in CS:GO. Perhaps the difference is minimal and varies from person to person but the difference in the arena is often that 1%.