Why would DXO's optical correction profile be superior to the manufacturers'?
The manufacturers profile is restricted by the need to do the processing in camera with limited time and computer power to produce jpg in real time. The lens correction profile embedded in the raw file is the same as the jpg.
Just take a look at the ACR file which uses the embedded raw file correction and the DXO file. A more sophisticated correction has enabled more of the lenses true focal length to be used as less cropping has had to be used.
Ian
