yamscorpa

Photo should be attached now

Just got a 2008 scorpa and noticed the rear shock was different to my old 2004 bike, spring is different and 2008 has a spacer at the bottom (see picture if it uploads) Does anyone know are these standard? was it an upgrade for the 2008 model and was it any different / better? I still have both bikes as I havent sold the old one and was wondering if I should swap shocks over ( im quite heavy and the 2004 one looks a bit more sturdy to me! Any info appreciated.