There's definitely a difference between the sizes of overgrips. 0,4 does not feel like a 0,6. Bab VS (0,4) is NOT a tacky overgrip, but Wilson Pro Sensation (0,4) is. In my opinion Pro Sensation is almost as tacky as it's big brother Pro (0,6), but doesn't keep being tacky at all. I would suggest Gamma Grip 2 (0,4)
http://www.tennis-warehouse.com/Gamm...GAMMA-GG2.html