So, both pairs run into each other in the back alley of a warehouse (with whatever items and trash are there). Both sides are initially unarmed but are allowed to use the environment in the fight.
Let's also say this is the Zeo-era Bulk & Skull, or at whatever point in the show's history where they became less cowardly that they could turn on character shields.
Remember, feats are of the utmost importance here. Who wins?