Differences between early model and new AE1007

[grasshopp]

I am looking at purchasing a early model (2008) AE1007. what are some of the differences (improvements) that were made over the years?
The main difference that I see right away are the seats in the newer ones are a bit higher in the back.

[JCOOLEY]

Only differences are the following:
Seat backs are slightly taller
Floor has pressure relief valve
Hardware such as D-Rings and some buckles have been changed
Graphics may be different

That's about it. No major changes have been made since 2006. Only minor cosmetic changes.