They are the same thing; I think it also goes by "6-bromolane".
Its an AI, and I would imagine activity would change with stereochemistry, but I am not sure exactly how, but typically an alpha substitution is more potent than beta or fluoro etc....
I would imagine that products containing 6-bromodione would be a mixture of alpha and beta, given the expense associated with separation. Also, 6-alpha-bromodione should convert into 6-alpha-bromo-testosterone, which should be a relatively potent anabolic steroid. So, if taken for PCT, it could actually be suppressive (like epistane, which is both an AI and suppressive steroid). Actually, I bet 6-alpha-bromodione would make a decent PH...
I think 4-HO-androstenedione has been researched more, but both could probably lower androstenedione production.
Edit: Don't over use AI's....