So i like the noise in the 330d, but it is gruff, more corse, but at least does have a nice 6cyl twang. More Manly...hmmm dont think so - its more Diesely yes.
Maybe my M135 is different, but it totally does not sounds like a diesel on startup! In fact the 330d on cold startup was more diesel than I liked until it warmed up.
Same applies for what Clarkson calls it "Diesel Tingle". The vibrations, even from the 6cyl are far more than the ulta smooth 35i.
Torque, get you point - and that is the strongest benefit of the black stuff. Although with cheaper Unleaded and the 335i achieving low-mid 40's the fuel difference is not a great as you may think.
out of interest, what is the list price difference between the two as well?