I don't know if anyone has tried one of the yellow ones yet and reported on it. The yellow one, and cheap white ones, are less dense foam than the ones that many here have used. I have not seen a walmart that carries the dense ones that I and others have used with success.

I havent compared the performance of dense vs. non dense, but I imagine the denser one leaves a smoother finish and for that reason would only use the dense one from home depot/lowes.