I use both.
I find that UPGP has better durability and is easier to clean, but OS has better looks. UPGP has a nice reflective "sealant" look, while OS has a wetter deeper look. But I find you need about 2 or 3 layers before UPGP starts looking good, while OS looks good after 1 layer.
3 layers of UPGP topped off with OS seems to have good synergy. Looks better than either on their own, imo.
If I were to use just one, I'd give the nod to UPGP because of the durability and is easier to clean. I also find it easier to apply - less streaky than OS. I always have streaks that need to be buffed off with OS, since I haven't perfected the application process yet :doh
I find that UPGP has better durability and is easier to clean, but OS has better looks. UPGP has a nice reflective "sealant" look, while OS has a wetter deeper look. But I find you need about 2 or 3 layers before UPGP starts looking good, while OS looks good after 1 layer.
3 layers of UPGP topped off with OS seems to have good synergy. Looks better than either on their own, imo.
If I were to use just one, I'd give the nod to UPGP because of the durability and is easier to clean. I also find it easier to apply - less streaky than OS. I always have streaks that need to be buffed off with OS, since I haven't perfected the application process yet :doh