Kerso,
Did you spec everything or pick and choice what would suit yourself. I basically specced both cars as I would want them, going for Sprint Blue with the S4 and Moon-something in the BM, I also pick the leathers I perfered on each and the extras I would like. I didn't pick the dearest HiFi system in the BM because I actually heard the individual in a 5 series and didn't rate it at all, it just goes to show how different peoples opinions are on what sounds good.
Though even if the Audi was £2k more I still feel it's worth it for things like Audi select drive and Sportdiff.