Understanding Subtractive Mixture: The Colour Wheel

only need to answer those two questions:
1.Describe how the value and saturation of purple #1 differ from purple #2.
2.What factors in the process of mixing colours subtractively contribute to the visual
differences between purple #1 and purple #2? (i.e. why is purple #2 better
than purple #1?).

I uploaded the wheel and the sketch of reflectance curve please check.
And the assignment outline and all the course lecture ppt are in below