ScrubDaddy was the original one, and was just the scrubby material. This is blowing my mind that not only there is a ScrubMommy, but in some areas it's more common than the ScrubDaddy!
It's called the scrub mommy because it has a soft side :)
(I didn't make that up, thats their advertising).
Also it does 2x the work for less money than the scrub daddy costs. I didn't make that up either, but it's true, they're cheaper, and that's very funny.