There are definately differences in quality between networking cables. One of the things I notice when pulling cables is the cheaper stuff usually twist and binds way too easily and can be a pain to pull. Its really stiff.
Better quality like belkin is easy to mold and pull, very plyable. Doesnt twist or bind near as much.
Pulling the stiff cable might cause problems if while pulling it, it gets caught and tears or breaks from excessive bending and twisting.
Definately want to go with better quality if doing long pulls in tight spots etc...