the 460 in an encore and a revolver will not even compare at all. the encore will give extreme(i'll call it) performance. i forget which bullet weight, but 2600-2700fps out of the encore a buddy on specialty pistols website has. maybe i'm wrong(don't have one)....but i don't think the revolver would/could get anywhere close performance wise with any bullet weight.
if you want a hoss cat....i think you found one.