This chart is a comparison of the same pigment of PY175 as prepared by two manufacturers, Daniel Smith in their Lemon Yellow, and Winsor & Newton with their Winsor Lemon, mixed with Daniel Smith's Transparent Pyrrol Orange. In this case there's not much of a difference. The only difference I notice is for Lemon Yellow in the center where the mix is lighter in value than the chart below's corresponding box. I didn't start with as much Transparent Pyrrol Orange pigment to make my mixes and was running out in my Lemon Yellow - TPO chart.