I also view them as two different cars (aesthetically anyway) - especially the rear profile, very different. Ive always liked the Z4 roadster, and if i wanted to get a roadster, that would be the one for me.
However, I was looking to buy a coupe, and so looked at alsmost all of them and came to the conclusion that the Z4 was best coupe based on:
2 seats only: No more airport pickups and favours for mates. Also, get the cockpit rather than cabin feel - I really like that
big boot: I like going to france and trips round the UK. sometimes take my PC to lan events too
amazing looks: coupes are all about sleek design, i dont think it gets any better. In terms of the classic tintop sports car, Z4coupe really blends traditional principles with modern design, I've always liked cars like the DB4:
...but obviously price and ownership complications make that impractical for a daily runner. with the Z4 coupe I get the long bonnet, fast back, straight six design principles but with easy BMW ownership (and a pretty reasonable car to run!)
Rarity: there arnt many rarer production cars on the road in the UK! No so likely to see a DB4 but I see way more DB9's etc than Z4 coupes!
On a side note, I cant get a roadster because I use gas permeable contact lenses and have issues with grit getting under them. Even with the windows down it can be a pain on dry days. Plus I like listening to music alot when i drive.
Just my tuppence, tried to keep it objective
