Absolutely true, Ive been using both quite a bit and actually like the Skookum better. I tested both on the Bandit in Marcus basement in sanctuary with my Mech using the 30% Explosive Relic and the DPS was slightly in favor of the Skookum. But ive seen a few folks looking for that Tumtum in the threads here and there. I think I got all the stats right for that cobra that hasnt been found in game yet. I havent seen a confirmed method yet myself, so im not sure if it still drops or is hidden somewhere or even if the Cobra originally shown was the final build. Both weapons are a blast. (pun intended)