Yes, they have called the VooDoo a beat in Wizard, and they also label their Warlock as a beadless Wizard. My best comparison would be the Warlock is a standard aviar and the Wizard is a KC Aviar.
"The Gateway Warlock is the same disc as the Wizard but without the signature bead. As a result, the Warlock is dead-straight stable out of the box and behaves like a broken-in Wizard, and has a later low-speed fade when thrown hard. A great putter to complement your Wizard."
"The Voodoo is Gateways Newest, fastest and accurate Putters. It is a great lay-up disc, straight line putter. Feels very comfortable in your hand. Acts like a broken in Wizard. "
-From Gateway site. Both are 'broken in' Wizards apparently. I use a Wizard for 95% of all putting. And a lighter Warlock for really longer putts where I don't want it to fade early on me.
That first quote is a straight up lie that has confused people for years. Gateway could not/would not/did not make a Wizard without a bead. The Warlock is more like an Aviar than a beadless Wizard because it does not have the Wizard's convex bottom wing but rather a straight wing like the Aviar P&A.
The Voodoo is closer to a beadless Wizard, but still different because it has a blunter and fatter bottom wing than the Wizard.