I don't know if cats are supposed to be able to see pinks and purples, but Turbo definitely preferred something about this batt over the following one.
These batts are blended once through the carder so layers are still discrete. They suggest tearing the batt lengthwise, then separating these into smaller sections of 3-6 inches. You mix these in a basket so that you get more random variegation, and spin a thin single to bring out the colors and silk. My previous experience with blends is they work best spun from the fold, because if you spin from the end of the fiber the longest fibers get sucked out first, and all the noil and shorter fibers end up in your hand.
I have something else I need to finish before I can work on these; maybe it will be motivation to finish the other project!