The longer barrel of the Bersa would give you more velocity the the .380 micro guns. I would opt for quality defense ammo. But carry what is reliable.
Many JHP rounds will show you *less*, not more penetration with increased velocity. With these rounds, they open earlier and further with increased velocity and penetrate less.
Other rounds will only open so far and extra velocity doesn't reduce penetration, it will usually either stay the same or slightly increase. The only thing the greater velocity does with these rounds is more energy dump (stretch cavity).