TransType grooms fonts while it translates them. Don't know if this helps a font not right to begin with. As an example, for older TTF type with ugly outlines, no hinting - TransType creates a faultless smoothly polished OTF which can then be converted back to a better TTF, or many other fine formats. Font Studio lets you fine tune font repair in thousands of ways, while TransType offers very few customizations, but always delivers a perfect job.