no brainer... M3. the sound alone... and then the looks of 1 vs. 3...
no doubt the 1M is a capable car but the M3 is in another league of prestige
for a track special only, compare the 1M to the Cayman S/R which are more tactile and fun
because at the end of the day, to most drivers, what matters is fun, not .1 in the 1/4 in favor of either car