If you could be specific about the exact lenses you're talking about it'd be easier to say yay or nay. If you can, list the focal length (50mm, 100mm, 80-200mm, for examples) and the maximum aperture. Most lenses are listed like this one, the most popular for Canon cameras: "EF 100mm f2.8 Macro". Without all that info it's impossible to tell you how good or bad a lens is.
Greg