I don't know about the accuracy, but the Sport series guns are better fitted than the standard guns, they are fitted with better sights, and with the front sight on the comp, the longer sight radius might make it seem more accurate. It will less using the same load when compared to the standard because: 1. the gun is all steel and the added weight will dampen recoil, 2. the longer barrel and comp puts more weight out front to keep the muzzle down, and 3. the comp itself, though not known to be particularly effective in a 9mm, would have at least some effect.