Re-reading the OP's post --
Originally Posted by
Cujo2811
Today I cleaned and lubed my chain with the clean ride lube....when I got to cleaning the chain off first, I noticed a blackish buildup on the lower 2 sprockets so I cleaned them off. Looked almost like ball bearing grease.
I think that's just the build up from dirt and wax from previous lubrication. Am I correct or is there another type grease for the lower sprockets?
Ah, my link has nothing to do with what you're asking, I'll bet.
No, there isn't another type of grease necessary for either end of the cassette (not sure whether you're talking about the smallest or biggest sprockets, but that doesn't matter here).
What you could be seeing is grease from inside the freehub/freewheel body. That's thicker than chain lube, and it sits either in the axle bearings or inside the hub where the pawls engage the hub body.
Is this the first time you've cleaned these gears? I'd also say to try the Mechanics subforum if you haven't already.