Coming from a highly modded 335i jumping on to the M3, yes there is a huge difference in power, but I don't regret it at all. My 335i had Meth, DP, Exhaust all catless, JB4, full coilover kit and still doesn't measure up to my M3 as far as driveability. Power wise is a different topic. As someone stated earlier, try to race a modded M3 to see where the 335i measure up against the M3. The 335i is a beast regardless, but the sound and feel of the M3 is amazing and hopefully soon, will be supercharged. If I was home, I would race you in heartbeat.