My experience is that the difference between liquid and paste versions isn't so much one of quality/durability, but economy. The liquid is faster & easier to use (ie, easier to get a thin coat, spreads faster, can use a PC), but you get more applications out of the paste version at the same price. My liquid versions of popular products (#26, Gold Class, Souveran) have been as durable as the paste versions (maybe even a bit longer in the Pinnacle product), and have looked oustanding.
I usually choose the paste version because I like to take my time, and I enjoy the feelng of spreading paste wax on paint.
I've used some similarly named liquids and pastes within the last 6 months, on single stage red paint.
Pinnacle Souveran Liquid (reformulated): removed paint (through #20/#26/PS)
Pinnacle Souveran Paste: no paint removed
#26 Liquid: removed paint (through #20)
#26 Paste: No paint removed
rhillstr, my understanding of Meg's Gold Class is that it is a carnuba/polymer blend, with mild cleaners to aid in application...
I just checked some of Mike Phillips' forums. It's a polymer/wax blend.
gold class #1
gold class #2 (towards the end)
I think that when "cleaning ability" is discussed in reference to these products, it's not the same thing as "cleaner/wax". These products are different both in action and intent.
My perception of the relative layering qualities of these Meg's products, from best to worst:
#26 paste
#26 liquid
Gold Class
Mosca