Let me clear something: Don't think a second that i am doubting about the competence of BMW's engineers, they are on top of their art. All what i am saying is: Like all other bimmers, the 6 has some some serious sporty skills but it's still a heavy GT while the 911 is made from the begining to be a real sport car ( i know, all things are relative but the 911 remains sportier than the 6) and so to make this heavy GT competing aigainst the most hardcore version of the 911, BMW will have to invest heavily in lightweight materials ( 1395 kg vs 1710 KG), chassis optimization etc... and why BMW would do it ? The 6 CSL wil be probably a limited version, so they will loose money and it has been stated clearly that one of the top actual priority is Profit so... Brand perception ? BMW has already a diamond reputation, and if they absolutely want to offer a comptitor to GT3, they can focuse on the M3 because the job woul be easier.