Billy Goat kv or wide area vac?

[Dixie Bluegrass]

Hey guys,
Was wondering about the billy goat vacuums. I am looking at the KV model and the metal monster wide area vac. I know the kv has a leaf shredder but I don't know about the wide area vac. I have some yards this year that are a dread to clean up. One yard is a steep hillside and puts out 100 bags of leaves unmulched. Leaves were so thick that when we were blowing them they got into several piles as tall as my neck ( about 5 feet deep )
My question is: Does the kv vac with the leaf shredder better than the wide area vac?

[White Gardens]

Your going to have to to dump your vac pretty frequently with that many leaves.

Could a bagger on a mower be a better option? You would get more use out of it than just a walk behind vac.

With my mower, I leave the tube off, mulch the leaves a couple of times, then bag them up.