Both these innovative blushes have long been of interest to me, but I always thought that neither would work for a woman of my brown-skinnededness (yes, I just made up a word - move on). Well, I was wrong. The Smashbox O-Glow, while sounding totally unbelievable and hokey, does actually work as promised. I tried it on myself, and two of my friends of a lighter skinned hue and it worked on all of us. On me, it's a brighter pink, while on them it was more subdued. I like it a lot and it works nicely for a natural look. I have to say, though, that I didn't find it to be long-lasting - I had to reapply a couple times during the day (I was sweating a bit, however, so take that into consideration). Also, I had to use a bit more product to achieve the rosy-ness I was looking for.
The Tarte Cheekstain worked even better! I got it in Tickled, which is described as a peachy pink. It looks red in the tube and when you initially apply it to your skin, but after you blend it some, it does, indeed, become a vibrant peachy pink. And it lasts for hours, with no reapplication necessary. I also like that it's great for layering - I use this first and then apply some bronzer on top and my face looks rosy and fresh all day long. Thumbs up! The only drawback to this is that you have to be careful if it gets hot - it tends to melt easily.