Daz: across the board (multiple engines), everything's new mpg figures have dropped and CO2 figures have risen in the VAG stable where new data is shown, not by much, but presumably they're not stretching the truth as much as they used to, pre-dieselgate.
Officially the old DSG 6-speed was a smidge more economical than the manual, but in reality it is about 10% thirstier in both GTD (comparing my old manual with my Dad's) and R (comparing mine with an extended test drive in which I started off driving as I normally would, and disregarded the drop in mpg when I started caning it). As the official gap has opened with 7-speed DSG vs manual, i'm expecting them to be about the same in real world driving around the doors, maybe the DSG will edge it on the motorway, as that rpm/speed difference in top gear can't be ignored.
The DSG's cost will be offset a little as the DSG will end up being cheaper on showroom tax than the manual under the new regime coming in April 2017.