i dont have that model, but it is a flipper, correct?
the detents on flippers tend to have stronger retention than many other folders. this allows more inertia to be generated when applying force to the flipper, and thus providing more force during opening creating better reliability.
eg, i have a darrel ralph flipper that also has thumbstuds. it is pretty much impossible to open using the thumbstuds. i just cant overcome the detent without poking a hold in my thumb.
i had the same experience with an xm18, which was traded for the ddr.
note: the above is not necessarily true for assisted flippers.