.OBJ & .STL limitations?

 From:  Sculpy
8673.1 
Hello all
Can anyone explain to a complete noob how these two file formats will limit me if I want to manufacture jewellery compared to the hugely expensive other cad formats people normally use? I would also like to design other larger stuff to be manufactured with cnc or laser cutting. Is this going to be a problem with .OBJ & .STL?
Thanks