It's virtually impossible to say which one shoots better than the other. Why?
First (and keeping it simple), in general not all models of Anschutz rifles will shoot equally well. There are a variety of reasons for this but suffice it to say that single shot Anschutz 54 models, for example, will on average shoot better than Anschutz repeaters. Perhaps the same is true of the Vudoo rifles, the single shot and repeater models. A shooter looking at deciding between Anschutz and Vudoo would do well to clearly understand the purpose of the rifle, for what it will be used. That may help inform the decision.
Second, not all Anschutz barrels will shoot equally well. The same is just as true of barrels on Vudoo rifles. Some barrels are better or worse than others, but fortunately the majority will be average for that make of barrel.
Third, and perhaps most important, is ammo selection. No rifle will outshoot the ammo it's given. In other words, the rifle can't make the ammo do what it can't do. Give it inconsistent ammo and there will be flyers. The rifle can't fix ammo problems.
If someone was to compare two makes of rifles head-to-head, he would have to ensure that the best ammo was used for each rifle. Without doing that, the exercise would be just as pointless as comparing two allegedly good runners, one of whom is sick but you don't know which one.
What do you want to do with the rifle?