If all you want is a difference in power...IMO the PDR has more power that the 6.1, but by no means is the 6.1 low powered frame. Both are on the heavier side, but the PDR gets a bit more pop from the stiffness. Both, with the right string set-up, can be rocket launchers.
4x Ozone Pro Tour. BHBR 54/52. Gamma Supreme OG. #64 RB...with only short term flings with KPS88, PB8 315, PDR, CAPed YT Radical, Rebel 95....