In the user guide, there are measurements for the x-rite colorchecker passport, and I wanted to clarify: is that the original, or the “colorchecker passport photo 2”? The original appears to be discontinued, but if the new version works the same I will just get that.
I think (but am not 100% certain) that the main difference with the color checker 2 is the addition of an 18% grey target. i.e. it doesn’t affect the 24 colour grid (which is the important one).