superdrol is mainly a pure anabolic .. meaning it has very little androgenic or estrogenic effects and only illicits anabolic effects (its actually got the highest rating of androgenic to anabolic ratio then any other steroid).
Dbol on the other hand is a very estrogenic and slightly androgenic steroid.
if you need to know what all those differences mean ..
androgenic = cosmetic and masculizing effects etc
estrogenic = increase volumization and IGF etc
anabolic = increase CP, protein synthesis, nitrogen retention etc.