How different are Canon versus Nikon Camera Controls?

I currently own a Nikon D5100, and I am very used to its controls and menus.  I do plan on moving to a Full Frame System over the next year, and wonder how different the Canon controls are from the Nikon ones.  Is this an easy switch?  I have held the 5D and 6D briefly, and like the way they feel in my hands.  However, I have not had a chance to play with their controls.

My main reason for no longer considering the Nikon D600 or D800 are quality control concerns and service issues.  If the Nikon reviews were as favorable as the Canon ones are, I believe that I would stay with Nikon.  Also, I found that the Canons feel more comfortable in my hands.

Thank you,

Christian