Better seller, better babyface, incredibly charismatic, better offence etc etc I really think Dustin belongs in the discussion for top 20 US workers of all time, and whilst I have him far below Flair, Steamboat,Hansen, Lawler, Funk and Eddie etc I think he's just as worthy as someone like Mysterio, Bret, Austin, Murdoch, Slaughter etc in the tier pushing to get from the top 15 into the top 10.
He was incredibly smooth in the ring and looked like a pro wrestler, was a marvellous FIP who knew how to inject crowds with his charisma and get himself over like Steamboat, Morton, Sting and others did in the same time, he's got some stellar performances and matches and is still a very good worker today even if he gets piss poor time to show it.
Bret's best match is better than Dustin's but bar Bret's 1994 I'd say Dustin from 1990-1994 for the most part could stack up against a lot of guys as far as peak runs go, he was one of the company's aces during their prime and when competition there comes from Arn, Rude, Steamboat, Vader, Flair, Eaton, Zbyszko, Morton, Windham, Austin etc you know the guy was something special. I much prefer him as a babyface worker than Bret and think with the right push he could have been a real force in the territories as a plucky babyface champion, he's just got so much going for him compared to Bret these days that I can't rank Bret ahead of him.
Arn is just the BOSS (well except for Springsteen), that should be common knowledge by now.