Originally Posted by The Glyphstone
For firepower, sure, but the difference in relative accuracy is going to go heavily against the Ork in that comparison - his bullet weight and rate of fire might equal the stimmed Marine, but in terms of rounds-on-target he's going to be far behind, so overall offensive effectiveness will take a hit.
Well, that and the problem with hyper sonic spikes is that they are designed for penetration, in most cinematics they simply go THROUGH the zerg, causing no lasting internal damage to creatures with minor regeneration.
A round that nests itself inside the creature and then explodes only needs 1 hit to kill, and that's what the difference would be between a marine and an ork.
That, and the ork isn't made out of paper.