Semi-Scientific Experiment: UDPP vs PurelyCosmetics' Mineral Eye Shadow Sealant

After reading on virtually every beauty blog out there about eye shadow primers, and the overwhelming popularity of Urban Decay's Primer Potion, I strolled on over (OK, schlepped over - it's a 30 mile drive each way) to Sephora and bought some UDPP, along with Nars Orgasm blush to dupe. I liked the primer pretty well - despite the fact that I seem to be straying more and more away from all