Hmmm. The 21 is worn and the Parker isn't. I guess he used the one he liked the best. The Duck grade is getting very rare also. If you duck hunted with him, which one did you see him use?....... Or maybe you could pick one and try to buy the other off of your cousin if you wanted. I did watch an older gent shooting skeet last Wednesday with a beautiful 20 gauge Parker and he didn't miss a bird while I was watching him. Tough choice. Then again, what will you use it for? If you are going to use it, I would go with the one that fits you best and handles the best.