UNIT - Creature Balance + Visual Changes

It depends on what you mean by "losing," losing 1-3 units is what I lose.

That's the point.

If we take the practical criterion of "what is profitable to put under attack when breaking through,"

a tank takes the hit and doesn't die. Meat takes the hit and dies (usually partially). The difference is obvious; these are different roles, although they are largely similar from the point of view of breaking through.