The only acrylic I've used on clay has been for antiquing, so I can't really give a good comparison there. I will say these are heavily pigmented and do not wipe as clean as acrylic will, so expect more color to be left behind. This was the only project I've used the WMO on but I can see in the really tight corners, where there is more paint....it has a shine like it is wet, so you do need to really work at getting the 'extra' paint off if you want it to dry thoroughly. The good part about this is it's something you are not going to have to seal (and what could you seal it with anyways?), but if you plan to use other things on the clay as well, you're going to have to take that into consideration.