Team 1.
The Geif can survive Siberian winters with no problem (dozens of degrees below absolute) in speedos.
Regularly takes on gangs of bears, with ease and can literally grab a full grown bear, jump several ft in the air, and give it a spinning pile driver.
Geif bumps his head on steel sealin' and bends it without even knowing.
He uses (gets caught) in tornados to perfect special attacks.
His UII is ridiculous, if he caught anyone on team 2 in it, the sheer height and drop on the neck would kill them.
Birdie can bend giant steel plates with his head, unintentionally, but that's pretty much all he's got so he would prolly go down. But not before Gief kills whoever he is fightin'.