Honestly, neither is likely; cyberzombies are (well, are supposed to be) massive infusions of cash and resources. Non-corporate cyberzombies would be rare creatures indeed - so any 'cult' that manages to get their hooks into one would be of Very Serious Concern Indeed, and shortly thereafter, Of No Concern At All - because you don't generally have to worry about the incinerated ashy dead.
Don't be fooled by the idea of someone else controlling a zombie, therefore cyberzombies are controlled by someone else; they're not. The zombie part comes in from the 'you should be dead, but you're not' portion. If you're going to use Deus, you really, really do need to read up on him - and on his methodology. Cyberzombies are very, very unlikely to enter into it, and when it comes down to it, a cyberzombie can give an armored platoon fits of trouble.