If it’s within your budget, the the extra spec on the Vorsprung is definitely worth having.
Assuming the car passes all the usual checks, it’s service history is all there, then there should be no issues with buying it from a non franchised dealer.
If your worried then the car above still has almost 5 months of the original manufacturers warranty left. If you got one from a dealer then you get a years warranty, breakdown and mot cover through the approved used scheme but you’d expect to that to be reflected in the price.