Here is another comparison video for the DLC. The tracks graphics do look very good in the video (older tracks are compltetely remade, while new tracks have been mostly remastered), but one thing that is missing from what we saw is any antigravity portions and all tracks appear to be completely faithful there originals.
I will say Choco Mountain looks UGLY.
Check out my lastest games review: Fast RMX and Snipperclips: Cut it out Together