Yea, broad generalizations I know. I was just stating it would be nice to have a difference between the two engines. And I restate what I was intending:
FZR - lightest, highest revving, least torque
XRR - medium, medium, medium
FXR - heaviest, lowest revving, most torque
As for configuration of pistons making no difference, that is false. Why else do some companies agonize over the amount of degrees in the V configuration? A narrow V produces more power higher up and a wider V produces more power down low.