[teagueAMX]

You guys are having a great debate about what's possible and what's not with firmware flashes, but I'd like to ask a follow up to my previous question in this thread about the DCT.

I was looking at the Z4, comparing it to the M3 and trying to figure out what it would take BMW to make a e89 M, including weight, suspension, etc. I frankly think they could slip the M3 v8 in the e89 chassis because the track widths are virtually identical (60.5 in v 59.5). But while doing that I realized the M3 has a "M" DCT option as well (sorry folks, don't kill me, I'm new to Bimmers). As I'm sure you'll all aware, that engine has a rating of 414 hp and 295 tq, whereas the Z4 n54 has a rating of 300 hp and 300 tq. I'm sure the tq rating is more critical due to shock value on a launch.

So my question is this:

Appart from BMW's rating of the two DCT's, does anyone know what's the real difference between a M DCT and Z4 DCT. I find it hard to believe there is a real physical difference, maybe even the part number.