Well, I think you should've tested it on an at least reasonably decent finish rather than one that's DOA. Doing it on a bad surface (like oxidized or something) will throw a monkey wrench into your test methodology. Neither, by the way, is meant to revive paint that needs work.
Even though both products have the word "glaze" in them I don't personally consider them to be really comparable products. One is a traditional glaze that (I think) has very mild polishing abilities, and is supposed to fill in swirls. The other is an acrylic sealant that has a job more like a pure wax than a glaze, but also can fill in swirls with a few coats.
Depending on what wax you top it with and how well the surface is prepped, people have had good results with a glaze followed by a wax. Multiple coats of SG in my experience works pretty good for my tastes in covering swirls (I haven't used a glaze then wax).
The "look" is in the eye of the beholder, but I'm not sure if you should be comparing a glaze to 1 coat of SG. If you're trying to decide which to use, I think what you want your routine to be is more important. My 2 cents.
