Both products use active charcoal to act as a magnet to impurities.Where the Origins is a clay-based mask, the Garnier is a clear gel scrub packed full of little charcoal beads. When the scrub is applied, the beads disperse and burst and the charcoal is supposed to absorb sebum and fight spots and blemishes.
As scrubs go, it is quite gentle and not at all abrasive on the skin which I appreciate as I have fallen foul of too many products (I'm looking at you St Ives!) that have literally left my skin looking torn up and inflamed. Along with charcoal, the scrub also contains 2% Salicylic Acid for its ultra-purifying and exfoliating capabilities. I know tolerance for Salicylic Acid can vary skin-to-skin so, it's important to be aware of this and avoid it if you know your skin hates it.
The Garnier has a RRP of €7.69 while the Origins mask comes in at around €25 (Though Debenhams currently have it on sale!) so, quite a steep price difference. Garnier say that you can use the scrub daily if desired which I find to be excessive but, each to their own. The Origins mask is designed for use once per week so, in theory it should last you much longer.