See the official specs as published at the DPR:-
http://www.dpreview.com/products/canon/slrs/canon_eos6d
Is that 11-point AF with central f/2.8 sensor borrowed from our Pentax flagship K-5II? ;-D
Btw, if the 6D is compared to the specs of the K-5II, the weight difference is only by 10g, but don't forget the 6D is a Full Frame camera and that it has the GPS and WiFi functions built-in. Unlike the K-5II/s, there is no need to add on a GPS module, i.e., the O-GPS1. And the K-5II bodies could never support WiFi of course.
Update: DPR has published a preview of the 6D.