A full load 10mm has quite a bit more "pop" than a .40cal (FBI decided it had to much recoil for a service weapon) "At full potential, the 10mm Auto produces energy a bit higher than an average .357 Magnum load and below standard .41 Magnum rounds. The cartridge is considered to be high-velocity, giving it a less-curved flight path ("flat-shooting") relative to other handgun cartridges. In its lighter loadings, the 10mm Auto is an exact duplicate of the .40 S&W cartridge. More powerful loadings can equal or exceed the performance of the .357 Magnum, and retain more kinetic energy at 100 yards than the .45 ACP has at the muzzle. "
Although it was selected by the Federal Bureau of Investigation for use in the field following the 1986 F.B.I. Miami shootout, their Firearms Training Unit "concluded that its recoil was excessive in terms of training for average agent/police officer competency of use and qualification", and the pistols that chambered it were too large for some small-handed individuals.  These issues led to the creation and eventual adoption of a shortened version of the 10mm that would evolve into what is today the .40 S&W.
It's a good shooter. Would love to find a S&W original FBI model1076 (differed from a civilian 1076 and think it may actually be called a model 1007) but they are rare, expensive, and difficult to find. They were issued with an additional 15 round mag to the field agents...almost impossible to find. Plus, since in my state conceal and carry is a God given right requiring no permit , I prefer the shorter barrel 1066 over the 1076's longer barrel. Even my 1066 is pretty tough to truly conceal, plus I like a horizontal underarm holster .