Had the opportunity to see the 650i GC at BMW Welt, the M6 and the Merc CLS at Mercedes HQ in Stuttgart...
Although the Merc may be the torque monster and tbh it will sound better (no surprise here) the overall package of the M6 GC is just better for me.
In my opinion the person who buys such cars, apart from the performance figures, will consider their looks and the pleasure of driving them. We all know the potential of the M6...not to mention the looks of this shark
Looking forward for some reviews and battles of these 2 cars