///M-roadster vs. Z4 3.0

Hello zettis, am a little rowing… ///M-roadster or Z4 3.0 if you compare both cars according to the data sheet, then the 90 more-hp of the ///M-roadster seem almost completely to go down: from 0-100km/h ///M: 5.4s Z4 3.0: 5.9s 80-120km/h ///M: 5.3s Z4 3.0: 5.8s top-speed at both 250km/h. has someone already tried both “against each other” and can describe the subjective impression? is the ///M-roadster worth the impact, at least in the maintenance? can you really be sure? differences “experienced”? or is the more modern, more spacious car preferable, since the driving performance seems almost identical? thanks for any assistance. mfg