The smoothing primer is meant to even out the skin's texture. It has a thick consistency like most smoothing primers have. It is non-oily which is a plus for me. I found that it smoothed out pores pretty well. The downside was that it made my skin a bit dry and flaky in some places.
My skin is both oily and super dry in some places, so I wanted to try out the hydrating primer for those dry spots. The consistency was more watery, like a gel lotion. Didn't feel like a primer, but more like I was putting a light moisturizer on my face. It claims to boost hydration and refresh tired skin. I don't think it did anything to help makeup stay on longer. I found that it worked best when I mixed it with BECCA's Backlight Priming Filter for an extra glow.
Ingredients list: (Left) Smoothing - (Right) Hydrating
Overall, I wasn't too impressed with both primers. I will most likely return them and try something else! Do you reccomend a good primer for combination skin? I'd love to know!