While I am not crazy about their service, I find MY 590 to be vastly superior to any Remington that I have ever shot, but it is not smoother.
I have had one jam, changed the follower to orange plastic, and have had no further problems. It is weighted correctly for me, and once Hans Vang did his massaging, is accurate as all getout. I replaced the "cheap plastic safety" on mine as well, I had a500 20ga. once where the safety lever cracked.
I have a Vang comp'ed Gunsite Police model 1187. It is a wonderful social shotgun.

However, I don't think a customized shotgun is a fair comparison to a factroy stock shotgun. If you have the money for one of Hans Vang's shotguns, then you wouldn't be considering a ~$200-250 model.