Thats not even a real BMW model, its a rendering of a hardtop E89 The quad exhaust and diffuser are by-products of modern styling, thats pretty much the status quo on any new sports car. Also that isn't a BMW styling cue, the entire industry uses diffusers and dual exhausts. Reflectors hidden in the diffuser is also a modern design element that isn't specific to BMW I am pretty sure the new Camry uses the same emblem on the front end. The A80 and A90 duckbills goes both out at 45 with A90 being more obtuse on the up portion. We can get incredibly granular about the Z4 and FT1 duckbills but that argument ignores that the A80 (and A70) have duckbills of their own As for similarities, I don't know any better way to say it than the A90 looks like the A80 if it were flexing. Lines become more pronounced and more aggressive, proportions exaggerated and muscular, and elements become meaner.