Well, I figured somebody here would know what the deal was. Guess not eh...
For the next person who comes along, I'll add what I do know, which ain't much.
I see on Tiger Direct they have two models of W7000 priced about $200 apart, with the only difference I can see being, the model number. One they call a W7000, the other is some off the wall 3 part number that looks nothing like the other. Both are described as simply W7000 in the product description. If the W7000+ is indeed the more expensive one, they don't make much effort to sell whatever it's got extra.
Here's the compare on the BenQ site. They went to the trouble of putting two product pages up, but not a stitch of difference between them on paper.