From all reports I've seen, including people who own/have owned both the VB and Vaporwarez units, the warez is every bit as good as the VB, and comes with a better warranty (the VB claim of a lifetime warranty is bogus, since warranty implies free repair for manufacturer defects or failures-it's really only two years). The warez is covered for 5 yrs. Pricing is also a little better on the warez, especially the eBay auctions that include grinder, scale, and screens.
Vaporwarez also offers two piece handkits-both standard and HF. The warez also seems to be more compatible with 3rd party two piece handkits like the ones from Vaporstore.
As far as screen changing on the standard whip, it's definitely a pain on most models. IMO the best one piece whip/wand on the market is the 7th Floor offering. Great price at $16, and it works with both the warez and the VB. Not only is it thick glass- 19mm heavy wall tubing - but screen changing is usually quick and easy. They even have an instructional vid on the site. Reusing the old screen can be difficult though. A new, stiff screen is much easier to install. Their screens are cheap though, so get a ten pack or two if you opt for their wand.