ThatNikonGuy has completed what appears to be the first review of the new Canon EF 24-70 f/2.8L II lens. It's a pretty good review as he puts them both through the paces. Lots of sharpness, bokeh and autofocus tests were completed at various focal lengths in the review.
He did notice the lenses differ in focal length at 70mm, this is pretty normal. For example, the EF 70-200 f/4L IS is not as wide at 70mm as the 70-200 f/2.8L IS II, it's more like 85mm in examples I have seen.
His biggest point at the end of the review is how good do you want your 24-70 to be? For an extra $1000 (compared to buying a used 24-70 version 1), is it worth getting the version 2 when version 1 is so great? I can't help with that yet, as I have not seen one land in Canada yet. It is good to know that when you have to make this decision, there really is no wrong choice.
Version 2 looks to be a little bit better at everything, autofocus, bokeh, sharpness, a more pleasing warmer image, lighter weight. The big downside is you'll have to go buy 82mm filters, hopefully you have some already.