There are significant differences between the 07 and 08. The 07 is on a regular Freightliner chassis with a Cat C7. IF this vehicle has a DPF ( I think it does) it is the last year that Cat provided any C7's for over the road vehicles. Unlike the 06's this is a problematic vehicle due to the emission system. It is the reason that Cat gave up on selling RV engines. It is my understanding they never did solve the problems. The 08 should have a Cummins. BTW: In 09 the Bounder was built on a custom chassis similar to the American coach Liberty chassis. An amazing chassis for an entry level unit.
2008 Dynasty 42' Diamond IV
2004 Safari Trek ( Mexico Unit)
2009 Silverado Toad