canon 6d vs nikon d600

I was a canon guy from past 5 years i bought 5DMkIII and i liked it but my brother has D800 and good Glasses i used his D800 around 1 month and sold all my Canon lens and MKIII bought D800 and good lens i really liked it never regret move, But then again its me every one has their on usage i would say if you really want Nikon dont go for D600 go for D800 and same as cannon better save and go for 5D MKIII its fantastic camera.