boy, do I think you're wrong here. The only thing I think Marion was better at than Rodman was weakside blocks and steals but that's about it. overall, there is simply no comparison between the two IMO. Rodman could LITERALLY defend everyone 1 through 5. Marion only does so because DA is dumb enough to make him.
I would agree with you on all counts accept Rodman couldn't guard the 1 or the 5. I remember many a game with Rodman getting worked by opposing teams centers as well. Rodman sort of made up for it by scooping up rebounds when opposing centers missed. If they were playing a team with a fast SG I didn't like that matchup either.
Rodman was definitely the man against SF and PF players though.