I have BOTH the Bersa Thunder 380 and the Bersa Thunder 9 Ultra Compact.
I love both guns, but my favorite (and my daily carry weapon) is the Thunder 9 UC. It has a 13+1rd ammo capacity unless you buy a California version, in which case it's 10+1, but the 10rd and 13rd mags are interchangeable.
The 380 is by far the most common Bersa in the USA right now, but the 9mm model (full size) is used by the Argentine police and military. Mine has been very reliable so far. It eats any FMJ or JHP ammo I've tried in it so far with no complaints. Accuracy is good, too.
It has an easy to operate ambidextrous thumb safety that also functions as the decocker. When you put in the magazine and rack the slide, the Thunder 9UC will be cocked and ready to fire with a single action trigger pull.
Like it does on the 380 model, operating the safety switch on the 9mm model decocks the hammer, making your first trigger pull into a double action pull.
UNLIKE the 380 model, if you wanted to carry the 9mm model with the safety on, you could, because the safety lever is in a very convenient place where you can flip it off with your thumb while maintaining a defensive grip on the pistol. It's much easier to operate from a defensive grip than the decocker/safety on the 380. Of course, I carry with the weapon decocked and the safety off, because the DA first trigger pull is safe enough for me.
If you went with the Beretta, you would probably be getting a good weapon, but I personally would buy the Bersa again if I had to make the decision over again. I love everything about it. Even after I bought my HS2000/XD, I still prefer the Bersa as my primary carry weapon.