I need a list for the differences ONLY please. The Audi 4 line-up models are: -Q7 3.6 -Q7 3.6 (Premium) -Q7 4.2 (Premium) -Q7 4.2 (S Line Model i.e.Sport line model) They must be 2008 year models not the previous ones.The differences can be on everything such exterior, interior, engine, gps, multimedia, ..etc.Follow.t ingeniously combines sportiness and versatility, sophisticated technology and the luxury of a premium-class vehicle. Enhancements for 2008 will make an already attractive SUV even more popular. In its second year, the Audi Q7 3.6, 3.6 Premium, and 4.2 Premium models comprise the 2008 line-up.