When a roach comes directly next to a unit or structure, he smashes it with his claws (or whatever), instead of spraying acid on it.
Does this attack have different damage amount than the acid attack? If so, how much, and how much does it benefit from each level of upgrades? Also, does it benefit from Zerg Melee Upgrades or Zerg Ranged Upgrades? Do both attacks have the same qualities in regards to light/armored units?
Also, does this melee attach deal splash damage? It sure looks like it, because roaches swing around with their claws, kind of like the ultralisk does.
And finally, is this of any interest while microing? Does it ever pay off to run up to the enemies first to make the roaches use the melee attack, or maybe the other way around?