Bora:
-Blocked machine gun bullets while running into them, no damage as they bounced off his soft, but firm body. He was totally confident he could take bullets from any gun.
-Could throw kicks and stuff, so he knew how to fight. Not just a good-looking fella.
-Tao grabbed his spear and Bora couldn't unfree it, then Tao effortlessly threw him in the air by swinging the spear (he only held the spear with a finger and thumb). Then threw the spear at Bora while Bora was in the air, piercing him and killing him.
Blue:
-Killed by Tao's tongue. He presumably couldn't land anything on Tao.
Tao probably chose a spear to kill Bora just because it happened to be there, rather than necessity. Maybe he grabbed it to show off that he was physically much stronger than someone with big, voluptuous muscles.
Blue thought he could kill Goku with a shotgun. So maybe he'd be killed by a shotgun himself, if not able to actively block it.
So I guess Bora.