I've got to admit, I have little knowledge of the other tools used for sculpting, but surely, blender is beyond the rest. Why? It's free, fast, powerful, and hey, you can extend blender so much. Add nodes, etc, and suddenly you see just how powerful it can be.

I'm learning just that these days. I'm using sculpt mode for everything, from rocks... to a sheet of paper floating in mid air (more on that later).

I like it so much I'll try to do a video tutorial about it :D