The colour for the 2006 is richer than the 2003 as the base coat
is metalic... Also due to the micro-mould casting technology, the
2006 Optimus Prime has a smoother and better fnishing than the
2003...
Externally it might looks the same, but if you take some attention,
you will know the difference...
If you want to get Optimus Prime, look out for the version release
of 2006...
