If you're shooting in bright light all the time, or on a tripod, then the slower VC lens is fine. If you need the faster aperture of the Zeiss, then, by default, it's the lens for you. Both lenses are VERY sharp. Neither is better, but the VC is just a superb lens, regardless of money. However, the first Zeiss lens i shot was the 21/2.8 in a store in Paris on a ZI with no viewfinder, rangefinder or auxiliary finder.. I just shot. I brought the film back home, developed it.... I went back the next day to buy the lens. I had to sell it a bit later due to money issues, but the lens was that good. It has that famous Zeiss rendition.