Very different. Superdrol got its name from super anadrol, which was more of a gimmick.
Superdrol was never released as a prescription. It is very similar to masteron. It is much more anabolic than dbol.
Dbol aromatizes where superdrol doesn’t. Dbol is considered anabolic however it is more androgen Uc than superdrol.
Superdrol is more for a lean , low fat body whereas dbol can cause water retention. This varies from person to person.
Both will screw with your cholesterol values, as is with all AAS.
Both will suppress your endogenous test production so I recommend test with the cycle. I have known people to use it alone.
I use Superdrol is more for cutting and dbol more for bulking.