I think it comes down to preference. I don't think that's too wild of a take.
I think Rodman was better equipped to guard 1-5 than Draymond. That narrative has never really been true with Draymond as any time he went against a truly big center, Golden State would usually offer up a double team or have Draymond front them while providing help on the back side. When someone says a defender can guard someone in my head that should mean without help which Rodman did a lot of.
Rodman was a much much greater rebounder and a better on ball defender. Draymond I think is a much greater off ball/help defender. Dray is a better playmaker and scorer. Shooting wise Draymond is a better shooter because Rodman didn't really shoot but it's not like anybody respects Draymond as a shooter so he's shooting wide open, but still better than Rodman in that regard.
I think Rodman is a better at getting in opponent's heads and causing them to fukk up. Both could be fukk ups that got bad technicals for their own teams. I'd personally take Rodman but not mad at anybody wanting Dray over him.