For the size the newer 9mms do much better....
If you have never shot a Walther PP/PPKs the first shot DA is very hard. I have had two PPK/S, Two PPs and one PPK in .22, .32 and .380. All were German made guns except for one of the PPK/Ss that was an early stainless...and it was let us say, not quite as reliable as the German made guns.
Cartridge wise, most JHP loads run a 90 grain bullet in the 850-1000 fps range. CorBon and a few others will break 1100 fps.... 9mm 115s from the small equal size guns will run 100-300 fps faster...
You may also find that the recoil of a blow-back action .380 is more unpleasant than a locked-breech 9mm...
If you can, try several guns in that size range before you buy...Bob