This is how box modeling in C4D & Sculpting in zBrush works.

box modeling you select a polygons ,lines or a vertices and move them.

sculpting you do not select a polygons ,lines or a vertices
you just slide the brush over the mesh.
zbrush has 100's of brushes that do diffrent things.

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box modeling you can add or subtract polygons ,lines or a vertices.

the basic sculpting brushes you do not add or subtract polygons ,lines or a vertices.
your just moving them around.
ya polycount could be a billion so it's a bit mute to worry about adding topology

but we can add or subtract with dynamesh.add horns to a monster.

and we can zremesh there's a lot of tools to do any thing we want.
list of tools
http://pixologic.com/zbrush/features/ZBrush4R6/

videos to see them in action :)
http://pixologic.com/zclassroom/homeroom/

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