The old one seems to have wider dynamic range (see eg. its histograms or the reflections on the pipes of the stand) and also little less noise according to that photos. But one needs to have more photos to judge poperly.
No one could hope for a free lunch. I believe that in terms of dynamic range the new camera will be on similar level as its rivals (not as 'huge' as they measured on DxOMark).I think I prefer the new one because of night shots and shots in a sunny weather.