Re: Urban Decay: ALL NIGHTERI've used the Skindinavia and done side by side comparisons- litterally spraying it on 1/2 my face w/ the other 1/2 covered (and therefore unsprayed). I noticed no difference, and in one instance, my shadow on the sprayed side creased. I'm so glad I read this, because I'm not sure I'd have realized that the UD sprays are the same thing.
BTW, I've also used MAC fix+ and it is not, in any way shape or form, a makeup fixative. It's basically a toner in a spray bottle, and, in fact, it's almost identical to Clinique's Moisture Surge spray (which isn't marketed as a fixative at all!) It's not a bad product for refreshing the skin and reducing the powdery look of makeup, but it doesn't help it stay on at all.