The new version has dual thumb studs (old version has single one), reversable pocket clip (thus there are 3 extra screws in the non-pocketclip side scale, can be clearly seen on the picture Cosmic Superchunk posted). Also the new version doesn't have serrations on part of the edge of the G10 scale (the old version does), and the G10 is smoother than the old version. Most importantly, the new version has a large odd shaped bronze washer in the locking side, which helps greatly to support the blade and avoid any side to side blade play. Very cool.
This is the info I got so far.