I like .38 Special revolvers over the .380's. You won't find any pocket .380's with any load that will pass the FBI's tests, but there are some +P loads for .38 Special that will pass out of a 2" revolver. To me, that says there's a significant difference.
I lean toward the S&W J frames or the Colt Cobra/Agent D frame. My J frame is actually a 6 shot .32 H&R mag which isn't a .38 Special but the .32 H&R tends to out-penetrate the .38 Special, so it's decent.
But my real pocket carry revolver is the 6 shot, 15oz Colt Cobra in .38 Special with Speer Short Barrel +P loads.
The .380's are nice, and it's nice that the reloads are flat and small. In a good pocket holster, the revolvers tend to look less like you're carrying a gun than a flat .380. And I just put a speed loader in the other pocket.
