I also have a Miata (actually my wife's ) and a smart cabrio, and as stated elsewhere, the two cars serve different purposes and are therefore designed differently. I love them both. Comparing the two is an asinine exercise in idiocy, and I would not subscribe to the rantings on the Miata.net site. With that said, the Miata is a sports car designed for nimble handling, and it would take some serious mods to turn a smart into a Miata. On the other hand, the smart is designed to do lots of things better than the Miata, and no amount of engineering is going to turn a Miata into a smart.If it makes everyone feel better, I will be replacing my 2001 Miata LS with a smart cabrio. Both will be used for around town commuter cars and short trips to the IE. I use my mini-van as the long distance cruiser [vegas, baby...LOL] and for hauling clients around to look at dozens of houses they will not be buying until the market has finally hit bottom [whine...]
Miata's and smart cabrio's fulfill the same function, and have exactly the same amount of luggage room, 5.1 cu. ft. The smart is less expensive, feels more rigid due to the tridion cell, has a better top mechanism, much better forward vision and gets about double the mileage. My Miata has never passed a pothole that didn't make it feel like it was going to break something (usually one of the expensive "sports suspension" shocks) and I have flattened two tires on a pothole on a major street by LAX. Even when the shocks are good and the planets align properly, it rides like a lumber wagon on the "well maintained" local freeways. It has also stranded me twice on hot days in the IE due to a faulty secondary O2 sensor in the tailpipe. I can't get my smart soon enough!!