Caliber .380 ACP (aka 9mm Kurz, 9mm Corto, 9 Short, 9x17mm)
Double action / single action
Barrel length = 3.8''
Pistol height = 4.8''
Pistol length = 6.1''
Pistol width = 1.4''
Sight radius = 4.9''
Weight = 23.3 ounces (unloaded)
Frame = alloy
The 84 FS does kinda look like a shrunken version of the Beretta 92 FS.
If asked to choose a half-dozen models of .380 ACP pistols as my favorites above all other available models of .380 ACP pistols, I would have to decline the request. Of all the different models of .380 pistols that the market has to offer, I have affection for only a very few, the Beretta 84 Cheetah being the most recent (and likely the final) addition to my small but eclectic .380 collection. The Cheetah is intended to be a shooter (as opposed to a "Safe Queen") and a carry piece once I feel comfortable with it at the range, and subsequent to logging substantial time carrying it inside appropriate holsters. It may take up to a year for me to see if this pistol suits me like I believe it will.
Each of the three .380 pistols in the above photo will fit into the side pocket of all brands of my bluejeans. Simply fitting into a pocket does not make a handgun a practical pocket carry. The easiest pocket carry is obviously the Seecamp, followed by the PPK. The Cheetah is akin to pocket carry of the chubby little Glock 26. If the pocket bulge is going to be equal I would likely opt for the 11-round capacity of the more powerful 9x19mm G26 over the 14-round capacity of the 9x17mm Beretta 84. However, for knock-about shoulder holster carry or IWB carry, the Beretta suits me a bit better than does the G26. The Beretta also fits my hand far better than does the G26.
The thumb safety on the PPK flips UP to fire. The thumb safety on the Beretta 84 FS flips DOWN to fire. That would be confusing during a life threatening situation; it is unwise for me to carry both of those pistols at the same time or to frequently alternate carry between those two. The Seecamp has no external safety; it is a simple point-and-click self-defense device. The Seecamp internal safety blocks the trigger when the magazine is removed. The Beretta Cheetah internal safety "disconnects" the trigger when the magazine is removed. The PPK has no magazine safety.
Capacity of each (with a full mag and a round in the chamber):
Beretta 84 FS = 14 rounds
Walther PPK = 7 rounds
LW Seecamp = 7 rounds
The most felt recoil is with the Seecamp and the least is with the Beretta (although, unloaded, the steel frame PPK and the alloy frame 84 FS Cheetah weigh about the same). As far as getting the most velocity out of the .380 ACP, the longer barrel of the Beretta should lead that race followed by the PPK and then the Seecamp.
The Beretta has a bit more sight radius than does the PPK. The Seecamp has no sights whatsoever but many shooters find the stylish little last-ditch-self-defense belly-gun capable of adequate accuracy at surprising distances.