I generally don't look at them as closely as you do, though sometimes I swatch on multiple papers.

I didn't take pictures, but today when I swatched some inks, Troublemaker Kelp tea came out really splotchy and weird on a colorverse card, and like I expected on tsubame, so just for the heck of it I got out one of my wearingeul cards and it looked completely different. I wish I got those shades of green and pink from it regularly.