LogFAQs > #880568207

And Zero survives ramming a shuttle into a giant space colony, causing it to explode. There is no way Zero is less durable than Mega Man here. They have equivalent feats by themselves, and lore dictates that Zero should be better in every category.

And again, you keep going back to this as a boxing match being a huge advantage for Mega Man, all because he has two punching moves, one of which is too slow to be useful. Zero is a melee fighter specialist, and I've provided MULTIPLE instances of him having punching cred, while Mega Man has very little to go on with how effective his punches are. Hard knuckle may be able to break down those destroyable walls in MM4, but a standard punch from Zero can tear through things at least 5 times as thick, and dismember his opponents, all in the span of time it takes Hard Knuckle to travel 5 feet.