After spending many, many, many hours in Sculptris I got to thinking "Now that I'm getting the hang of 3D Scultping, maybe it's time to try and make sense of Blender's 3D Sculpting?"
Turns out, I really, really, really like it.
Especially since I can copy / edit / duplicate / light the model while sculpting, I don't have to close the door on one phase.
BUT! So far I think Sculptris's texture painting is way better. Scultpris Texture painting has a much faster workflow & better UI, so I think I'd use Blender's Texture Painting only to add a few more layers in special cases, like Specular Painting.