Well both Heller and the Zerg are very similar, both have the same basic power, the ability to consume other organisms' biological advantages, however Heller does have the notable advantage of being able to use any weapon, and if he can't, all he has to do is is find someone who can, so honestly it's alot like, guy with gun versus guy without gun, and the safe money's always on the guy who can kill you instantly from 1000 feet away.