We all know that 2 obvious differences between the 2.8L & the M versions of the roadster at the cost ($A91,500 versus $A136,500) and the engine output. However, many articles I've read (in Australia here) seem to suggest that the most important difference is the handling. All articles (even those that are overall quite positive about the car) have said that the 2.8L version is too harsh (ride-quality-wise), too jumpy & too unpredictable at the extremes of cornering. The M Roadster, in comparison, has been tweaked by the M division to have even stiffer springs (amongst other changes), but paradoxically feels less harsh, much more balanced, with a more predictable and controllable move into oversteer at high speed corners and much more plesant to drive.
Now, bearing in mind that there may be more differences between that American and Australian/European versions of the M Roadster than just the engine, can anyone comment on these comments?