Upgrading Yamaha PG1 Rear Shocks

After almost 2 years riding the PG1, now I have decided to change the stock rear shocks to a performance set. The stock started to feel very soft & sways on & off the roads. 

The stock looks very thin & simple. Well to be honest it's a good set of shock but just not good enough with my riding style.

Stock versus performance shocks where the performance looks a bit more solid & noticeably bigger.

Definitely more solid if to compare to the stock version & it feels less swaying too during my 50 minutes test ride. The damping is very good, less bumping on uneven road surfaces.