I just did a test over the weekend on the hood of one of my cars for the same purpose. I did the whole panel with NXT, then taped it off in 4 sections. Second coat was my 3 favorite LSP's, Meguiar's #26, Griot's Best of Show & Collinite 845. Last section was another coat of NXT. I looked at it indoors and outdoors, under artificial light, bright sun and an overcast sky, and couldn't tell a damn bit of difference in sections. Considering its ease of use and durability, 2 coats of NXT will be my go-to LSP on that car from now on. Gold Class is a great product, but the only way to be sure is to do a 50/50 and see for yourself on your car with your eyes. As the man says, your mileage may vary.
Bill