I like the new X3, but I think the X3M is not that much different looking to X40iM and doesn't seem that special or aggressive enough. When you look at the GLC 63 you know it's a more sportier special version of the GLC, it looks vastly different to other models, it looks quite mean and also it has that amazing V8, which sounds incredible and performs at a pace that is quicker than all its rivals.
