There is still only a German press release available. But in essence the car is the same as the coupe version, without the roof.
So specs can be found here ---> [URL="http://www.ultimatecarpage.com/forum/matt-s-hi-res-hide-out/32082-bmw-e92-m3.html"]BMW E92 M3[/URL]. If anyone desperately needs the M3 E93 release in the future, you may always contact me.;)