8 month update:
Pink & Yellow: both have a smooth foamy lather to start, but then get bigger bubbles. Yellow might have had slightly bigger bubbles than pink, but they were pretty close. After-feel was fairly decent.
Green: smooth, bubbliest lather. Made a mistake, so this had a lower SF than the others, and it had the highest percentage CO to start anyways. Still, it was more cleansing/stripping than I care for.
Blue: so bumpy it's actually exfoliating. Bigger bubbles to start with, and the after-feel wasn't bad, but I was surprised by exactly how scratchy it started. It seems to smooth out with use, and I could see it being nice occasionally, but I wouldn't use it super frequently.
Purple: foamy lather that is more bubbly initially than pink and yellow, but a little bump here and there. The few bumps were more grainy or massaging than scratchy or exfoliating. Decent after-feel.
That said, a year+ is the recommended cure time for a reason, and none of these soaps were quite as mild as I prefer yet.
This lather test was at a house with softened water, I'm going to try them with hard water at some point this weekend and report back if any noticeable differences emerge.