I was bored last night, and since the spoiler that came with my car has now been removed and sits in a corner in the garage, I decided to do a little test.
I cleaned it up with some PB's Spray and Gloss and then did half in AW Duragloss and the other half in Crystal Mist.
On my paint the Duragloss actually felt smoother and had more of a "glow" to it. They both had about the same depth and showed the metallic the same. But that is just based on my observation. I use the AW after each wash because it is quick and makes it look good with minimal effort.