Unidirectional carbon Fiber laminate are mixed with epoxy and sometimes aramid fibers like Twaron or Kevlar in the layup. Even paint will effect how the racquet feels/flexs and will change the characteristics of the frame which is why to Sampras or Andy Murray they would not change the paint of their frames.
My original stock Austrian PT630's had %6 Twaron in the layup and felt damp and muted. The last batch of Chinese PT280 did not have Twaron nor did the iprestige MP, they felt crispier. After that production run they pretty much all felt hollow to me, different (maybe less quality) graphite and other materials were introduced like intellifibers, Liquidemetal and now microgel etc were mixed in the layup.
I noticed you liked the microgel radical pro. The reason why you liked the micro radical pro is because the shape of the hoop is different. It is a new semi tear drop shape where they lowered the bridge to have instant out of the box gratification like the Prue Drive and it works.
