Difference between various Fischer Pro no.1 versions

[Ace Rimmer]

Is there a difference between the versions of the Fischer Pro no.1 that have been out over the past few years, other than paint schemes? It looks like some previous versions had ceramic in the composition; whereas the current model has fibreglass. I would assume that this makes them play different. If so, which version is preferred?

 

[RKS12]

I have 4 PN1 frames, two are the 2003 version and two are the 2004 version. They have identical specs written on the frame including 11.3 oz unstrung weight. They seem to play almost identical to me except the 2004 seems a little more muffled in the feel. These are the USA versions. I'm pretty sure the European version is heavier, around 11.6 oz unstrung.