Strange that subjective perceptions can differ in a such pronounced way...
For me OS is far more reflective and glossy than UPGP, which looks *nothing special*. It need 3+ layers to look good in my eyes. Also, OS holds its look better on *my* car.
UPGP has a slighly meatier, more substantial feel during application and more initial slickness as others noticed, but true, OS pulls even after curing.
I'm using the same amounts of both per application, but I apply them with MF apps.