Image construction was the same. The things that changed were the color of the support, the color of the sharpie marker, and the use of construction paper crayons for the other line work. Only 3 changes, but their visual impact was considerably large.
I enjoyed seeing some of the students taking on more elaborate base shapes to fill with patterns.
The drawings were also larger. We went from 9 x 12" to 12 x 15".
I changed the color of the support after seeing the below image that Supermundane created a couple of years ago. There is still a sense of depth in the image even though there isn't the stark contrast between black and colored lines like there is on a white support.