Originally Posted by ovekvam
I don't think the xDrive does torque vectoring, but the e-diff does this.
I don't understand how you mean the X-drive moves the center of gravity backwards. The center of gravity is usually between the front seats, and pretty much all the extra hardware for the AWD is located ahead of them.
You're right, it moves it downwards, but also forwards, and that is not a good thing. My mistake!
But you're right, probably less dynamic behaviour then: The vehicle roll is a bit less, but the yaw will incline more to understeer like you wrote.