i don't have an all gold DY piece, all mine are two-tone. but i can tell you that yellow gold is softer than white gold (something about the process) and the higher the karat of gold the softer. DY uses 18k which is softer and more easily scratched than 14k.
Thanks. That I think I know. What about DY 18k gold vs DY silver? Thinking of stacking my all gold cable cuff with the DY silver ones. Is that a concern?