I have both on hand, and have used both a few times each.
IMO, both are outstanding products, both simple as pie to use, easy on, and very easy off. With either product, it would take less than an ounce to cover my entire '97 4dr Tahoe SUV.
Both look similar to each other, and have a similar consistency-viscosity.
Menz Powerlock looks like a light lime green sherbert, whereas WGDGPS 3.0 is a pastel yellow color. There is a difference in smell, so I would say they are not the exact same product, or just a different dye, and a relabel used to differentiate the two.
Rumor has it though from other members here, and I believe even Wolfgang themselves touch on this, is that Menzerna makes the Deep Gloss Paint Sealant 3.0 for Wolfgang (as well as the polishes), and I can believe that. Wolfgang probably chose a more specialized-personalized formula for their brand, and I would suspect a quite similar level of longevity from both products.
Both possess a beautiful slickness of shine, some say "nuba like", and perhaps so, but on dark colors, like my Kia Spectra in Magenta Pearl, the Paint looked dripping wet with either product. From a side angle, my paint looked like I sprayed a coating of glass on it.
Very hard to stop staring I had found, you'll want to look at your paint all day long!
I had thought initially, that Menz Powelock had more ability of attracting dusts, as I live in a very dusty climate here in the desert southwest, but I have no scientific proof to back such observations. Dust conditions here vary by the day, from bad, to horrid. Not only brown dust-dirts, but white Gypsum dust from the largest Gypsum Field on the Planet, White Sands National Monument and Missle Range, just a few miles west of me.
Thus, it is impossible to gauge dust repelling qualities of either with just casual observation. It would probably be correct to say that they are actually the same in this regard.
As for how much to buy? I would say a qt of either is a whole lot of product! I bought a qt of the Powerlock, and could probably treat a small car dealership with such a quantity, but as you know, larger quantities are usually less cost per ounce. And I had bought the 16oz I believe of WGDGPS 3.0
The 8oz bottle might be best, try it, you'll have enough in the bottle to protect probably 6-7 large vehicles easily, and probably 8-9 smaller vehicles no trouble.
As for satisfaction, I think you'll love either product, and won't regret which you buy.
Mark
