I think the most obvious reason is that Superdrol is so strong that it'd be hard to notice the furazadrol at all. I have never used Furaz but i never plan to... I'm sure it works great for some people even at normal doses but I know a lot of dudes need to run like 300mg a day of Furaz because it's SO weak and so it's just not very worthwhile. Compared to Superdrol, it's like nothing.
If you want to run a SD based stack for a cut or recomp, you'll only have like 4 weeks to lose the fat because SD is so harsh... So you'd need to do some hardcore ECA or T3 or Clen or whatever your weightloss method of choice is.
Typically I think recomp and cut cycles should use the weaker orals just so you can run a longer cycle like at least 6 weeks. It simply takes time to burn the fat off.
Halodrol/Epi stack gets my vote, i've never done it but I think it fits the bill.