Hi, both those models use the n52 engine with the e89 a handful of horses down (due to emissions I think)
You won't notice the difference in output so it comes down to looks/feel & wether you desire a convertible or not.
Get a drive in both before you commit
Rob
As smartbear said the 3 litre E89 is a few horses down on the E86, but I doubt either would disappoint!
I've only had E86s as I don't want a convertible in a country where it rains most days, and as has been said the E89 is seen as a bit more GT than Sportscar. But you really need to try to drive both and decide from there. (But ignore buzyg, you really don't seem to want an E85). :lol:
Whichever you go for I'm sure you won't be disappointed - just let us have some photos when you get one.