What is the difference between this and the 2008 Flash Lite Games Contest?
Essentially none at all. The Playyoo Games Contest is run in collaboration with the organisers of the 2006 and 2007 editions of the contest run at www.mobilecontest.org. The 2008 Flash Lite Game Contest is specifically for members of Flash Lite User Groups has its own hosted pages to provide continuity from early editions, but games entered through either path all end up in the same place. If you are an experienced Flash developer you may find the resources at the Flash Lite Games Contest site to be very interesting.