Bersa for me
Good review, much more detailed than mine:
I had Interarms version of PPK/S - it was not a good shooter for me: would not reliably feed some good quality ammo (many JHP, some FMJ using two factory mags). No problem for me w. hammer/slide bite, though. I sold it.
Much later I got a Bersa Thunder .380 - love it: great price, unfailingly reliable, accurate. True, finish on PPK/S is better than Bersa - but not nearly enough difference in finish to make up for reliability and price superiority of the Bersa.
For the same money I'd take a Bersa over a PPK/S; given that the Bersa is much less costly than the PPK/S, it is no-brainer for me.