@tommy Nope: not enough information.
For starters: what settings on the Sony software (keep in mind that it knows the camera processing and can read all the makernote settings)?
Then: same export conditions on both, like file format, output size, drives? (exporting to local hard drive will be way faster than exporting to an external (USB2 or network) drive.
And finally: did dt really use sixteen hours for the export?