Meguiars has tons of different waxes.
From the Mirror Glaze line,
#6 cleaner wax
#16 Paste wax
#20 Polymer sealant (ok not a wax, a sealant)
#26 Hi-tech Yellow Wax
The Gold Class wax is a consumer wax, its a cleaner wax. The Meguiars #26 wax is a non-cleaning carnauba wax that can be layered.
I don't like the Gold Class wax very much, its like a cleaner wax and clouded the BMW finish because of its certain polymer.
I used to be a die-hard Meguiars #7/#26 user. It produced good results. I also layered the #26 on top of Klasse with sucess.
Blitz is better than #26 though, lasts much longer. I use Blitz and Souveran (oh I love this wax) now.
The #26 and Gold Class (both paste) sits in a box now. I will probably give the Gold Class to someone if they want it, #26 to soemone that knows a little bit about polishing the car (got the old tin, not the new plastic container.)
With proper prep, both waxes can ake a finish stand out.
I give the edge to the #26 (over the GC.)
but it depends on finish prep, the #26 has no cleaners so the surface must be in good condition. The Gold Class is a cleaner wax so it can be used on mildy oxidized finishes as a one step product.
I did manage to apply Meguiars Gold Class, wait a week, wash, then apply two coats of #26 with sucess. The black paint on that 93 mustang came out very nice. I did use #7 before the waxes to polish the paint though..........
Just my thoughts,
Jason