I was using Arteza before I took this course; I have started using M. Graham since taking Sade's course, and because she ranks them highly. Quite a difference from the Arteza paint, as I think the images above clearly show. Also quite a difference in use -- Arteza tends to be watery or oily (they don't list what the vehicle is for the pigments), M.G.&C. is buttery or thicker.

I love the variety of color that Arteza offers -- M.G.&C. only has 35 colors. But that's why it's important to know how to mix colors for a secondary or tertiary hue. And I'm still learning, as the charts show! 

Arteza Premium and Arteza Metallic can be found at any of the online art supply websites, for example Blick, Michael's or Jerry's Artorama. Blick's is where I bought the M. Graham & Co. paints. Arteza is relatively inexpensive, especially compared with M. Graham, which is so expensive I could only purchase a few colors, but will hopefully add more as my budget permits... 

(The photographs don't accurately show the darker colors on the charts. Also,the Arteza Metallic chart reflected the light, so the colors are faded looking. They are definitely more pale than M. Graham & Co.'s colors or even Arteza Premium, but they're not *this* pale!)