Bluemotion Tech has stop start and regenerative braking which makes it more economical in the test lab.
If you are looking to get more performance, I'd buy a 2.0 140. I had a 1.6 BMT for a couple of weeks a few years back. I did the same sort of journeys and drove it just the same as my 2.0 and got exactly the same mpg. The 1.6 may be slightly more economical in town, but on rural roads there is nothing in it. The only saving the 1.6 would offer is cheaper VED.
As for DSG, my Passat has done 60,000 miles now and been faultless, so I guess it's the luck of the draw. The internet is full of tales of woe, but hardly any stories about how good things are. There will be hundreds of thousands of 6 and 7 speed DSG's that will have been as reliable as mine.