Depends upon assumptions.
If normal Scourge is assumed, then definitely Baras.
If Emperor's Wrath is assumed, then the contest becomes interesting:
Baras, if assumed to be augmented by the power of entity, might be strong enough to handle Emperor's Wrath; otherwise, maybe not.
Emperor's Wrath also have an advantage of his own; his relatively superior dueling ability. So he may just out-duel Baras.