I was at Austin Homebrew Supply and I was looking at the different models they have there and I just couldn't see any advantage in having the Vinator mounted to the top of the tree.
The tree is just too tall IMO. It is weird to have to reach up to sanitize the bottle, rather than just the Vinator sitting on the countertop.
I actually prefer the smaller tree because it has a handle mounted on top, so you can move it when all the bottles are hanging, but it only holds 45 bottles, which isn't enough for a 5 gal batch. (Though it does fit 18 32oz bottles, which is what I use it for) The Vinator is cool, though. It is inexpensive and works well.