I use the Blue Nanoskin Sponge. I have not used the mitt or towel so I can't give a comment on it. I can tell you, however, the Nanoskin (Blue) sponge is incredible and is just as good or better than "traditional" clay. You will finish "Nanoskinning" you car in about 35-50% faster than clay.
Additionally, if you drop the sponge no big deal just wipe off and keep on truckin. With the old clay they suggest to throw away or risk damaging your car with scratches the clay picks up when you drop it. Additionally, you will not experience pieces of clay on your hand or stuck on the panel.
I have 1 clay bar still in its wrapper. It is now going on close to 1 year old. It will serve its purpose as a paper weight and is doing a great job as a paperweight.
You asked if you can get the same results as traditional clay. Yes you can get the same results as regular clay. Not only the same results (I think better) but accomplish the job in nearly 1/2 the time as the old clay way.
I like the Blue Sponge because it is like a fine clay. The Yellow (which I have not tried) is more medium type "clay".
The main reason why I have not tried other Nanoskin Products is that the Blue Sponge is all I need. Additionally, the sponge will last 2 to 3 times longer than clay.
Again, this is my opinion and I hope it helps.