ColourPop Hot Fuss is a neutral-toned, medium-dark red with a natural finish. It is a permanent blush that retails for $7.00 and contains 0.48 oz.
ColourPop Hot Fuss Cheek Dew Serum Blush ($7.00 for 0.48 oz.) is a brighter, medium red with neutral-to-cool undertones and a soft sheen. It had sheer color coverage, which was somewhat buildable to semi-sheer to medium coverage, though it was difficult to get an even application of product that was diffused and blended out along the edges.
The formula just seemed far too slippery and runny, and while it dried down, it took awhile and was still slippery to the point where the color was more likely to slide and get pushed around then to blend evenly. There were always slight patches--even with my best attempt--where I could see the color had lifted up (when I used a fingertip) or bristle marks.
The dry down wasn't tacky, and it didn't seem to slide around too much during wear and was more prone to fading around the six-hour mark. I tried so many different ways to apply it to my skin, and there was not one truly successful attempt. It was particularly prone to lifting up foundation, so it was best over bare skin only (which wasn't great!).
FURTHER READING: Formula Overview, which is a detailed review of the range as a whole.