i think that superdrol would be much better suited for a bulk. For me at least the lethargy superdrol brings on plus being on a caloric deficit would be absolutely brutal.
There have also be some discrepencies as far as purity goes as well. (some users of some clones report bloating, even though this should be a very dry compound). I wouldn't want to risk this too close to the contest when you're trying to dry out.
I've never used halodrol, but I've heard it's pretty good on a cut. Hopefully someone else can chime in.