RE: oral winny only
Winny will give a harder look and feel to your muscles where as dbol would bloat you out, both cycles would give good results either way. You will gain more weight, mostly water tho, on a dbol cycle. Forget the idea about the sust though, there's no point in have a quick jack up on the hormone levels as cycles are all about constant levels to maximise gains.
As for keeping results, this will depend on the other factors of eating and sleeping!!