I have both, actually three. The SMART, MP3 250 and MP3 500. Love them all. Each has its own things to love. I usually drive the MP3 250 to work, gets about 65MPG and has storage galore. The MP3 500 could only be categorized as a sport scooter. Can easily get to 90 and hold it, has stifff suspension and looks evil. The poor SMART gets all crappy weather conditions but I treated him to GPS, additional speakers and SIRIUS radio and traffic. I can honestly say my vehicle spending spree is over.