I use Gold Class on my wife's car because it is an easy one-step and because I need to use it up (I use #7/MPPP/and now #26 on my car). So this weekend, I put on another coat of Gold Class, and then later went and put some #26 ove half the hood. When I did this on my car with the MPPP, the #26 brought out a lot more depth. When I did it over the Gold Class, I couldn't tell the difference at all. The Gold Class really is an excellent all-in-one if you don't care about longevity.
Also, here is what the box of Gold Class says (emphasis added):
You're holding one of the finest car waxes we've ever made (and we've made some great formulations throughout this century). What makes this formula so special is its incredible reflective qualities. Regardless of what paint you have, this formula will dramatically deepen the color, bring out the full richness of the paint and create clear, sharp reflections unlike anything you've ever experienced. It glides on and off easily; cleans the surface, removes swirl marks, adds polishing oils, reduces UV ray damage and adds tough, long-lasting polymer protection. It's truly in a class by itself.
So, it does contain cleaners. However, I think they must be awfully mild since it doesn't clean nearly as well as their cleaner/wax does (which is also fairly mild). It's also mild enough that they recommend you use the Gold Class Clear Coat Prep and Swirl Remover if your paint has swirls or blemishes. Even the CCP&SR has a disclaimer stating:
Note: This is a very safe and very mild product. Abused or neglected paint finishes may require a more aggresive cleaner, machine buffing, or even repainting.
Your original question was about which shines better (and you later reiterated that you don't care about longevity or anything), though, so who cares if it has cleaners or polishes in it as long as you like the end result? I don't think it's a mistake that they call it the most reflective wax they've ever made. They didn't say "the most reflective consumer-line wax" or anything. I mean, I like #26 too, but Gold Class really lays down the shine...
Really, though, I don't think the durability is horrible. It might not be great, but it isn't bad. I used to use it on my
ungaraged daily-driven Corvette, and it would last well over a month. Plus, it looked awesome with very little work. It seemed like multiple coats lasted a little longer, but it could have been an illusion (as they were usually a week apart, which would obviously extend the life by at least one week).