Which 450 should I buy???

[Homer]

Hi guys, I'm looking at becoming a Gas Gas owner, and can't decide between two FSE 450s for sale near me.

A 2003 model in immaculate condition with just 2900 kms or a 2006 model, a bit rougher condition with 6500 kms.

I'm leaning toward the 03 model, but I'm wondering what are the differences between the two bikes that may influence my decision?

I believe the 06 had a slipper clutch as standard. Anything else???