I currently own 4 Widows.
PSA III, PTFX Osage Limbs/Cocobolo Riser, PRS II, and PL V.
In my opinion the bamboo limbs have a different feel, but not much difference in terminal performance. Unlike other X models, if you choose Osage limbs they will not have bamboo cores, all the wood in the limbs is Osage.
The bamboo cores seems to make a greater difference in feel in the PL series. I attribute that to the thicker limb cores.
I feel the real adavantage, in terms of feel, with the X series is that different woods will slightly change the physical weight of the bow (as mentioned above).
For what its worth, my go to bow is the PSA Autumn Oak.
Again these are my opinions and observations .... your mileage may vary.
Freeze