all things are relative (except ethics, except for the denizens of the beltway- insert political tirade here)
i believe that you'll find that conventional wisdom leans heavily to leaf- type spring for speed.
tons of time and seas of ink have been spent in search of "faster lock time," but i cannot help but suspect that more would be gained by taking the time otherwise spent debating the matter and going to the range to launch lead.
after all, the posession of a sub minute- of- angle rifle doesn't mean that you can shoot that well, anymore than the purchase of an expensive violin makes one a virtuouso.
don't worry, be happy, make smoke!