Unfair to compare the weight of the walnut HC version to the beech MKIII.
Cocking effort 5 lbs more for the HC.
Barrel ~3.5" difference and OL ~3.5" as listed.
Looks like the shroud extends each barrel in equal amounts.
I bet there is at least 50-75 fps difference with standard 8 grain pellets.
No big deal.
Thanks to PA for the specs.
LL