Difference is that:
1. New nanos;
2. New Labs/missions;
3. Totally changed skill and stat systems;
4. New clothes;
5. M.B. they rised lvl cap;
6. Better graphic;
= It looks like whole new game, not like Project 2
Old GX - yes. With CE 6.1 and EagleNT Properties.
New one - no. They updated HSPro and somehow attached it to .exe >.<" . So when you try to do something with CE , it just closes. But nothing appear if CE opened and you do nothing with it.