I really don't know. From what I've researched superdrol is just not a commonly used or healthy drug. I've seen it compared to being as toxic as running High doses of dbol and anadrol at the same time. Overall the consensus is it will throw your lipids, cholesterol, and blood pressure out of whack. And reak havoc on your liver. I've even read about superdrol related deaths, as rarely used as it is used.
I just can't see putting that in my body for 3-4 weeks regardless of how anabolic and dry it is. As some earlier in this thread have said, to add lMB the best thing to do is just to up your cals, and bulk steadily on compounds like test, Or maybe deca.
I would do some research if your that serious about doing it, and decide. my decision is I'm not going to ever take it.
Tren, is a great all around steriod. Bulking, cutting, and recomping. It's also terrible health wise. But I would be more inclined just to run tren than superdrol at least. It's a similar drug IMO. Lean and dry amazing gains. Although with one at least your not wreaking absolute havoc on your liver.
Others may chime in, but this is my perspective