I won't bad talk someone else's choice of carry weapon. What I have found to be valid is if you plan on Conceal Carry with a full frame weapon it will take you some time to find the "correct" carry holster that fits your body and how you plan on using it. It may take multiple holsters depending on what you wear or choice of location at a given time. I know allot of people that carry full frame semi-autos (Kimbers, Glocks, XD, etc..) every day and do so comfortably, the kicker is no two people carry the same way. Is it easier to conceal a smaller weapon? Of course.
If you like the way the Bersa shoots and the weapon fits your body, then by all means you should carry that.
I grew up so to speak shooting M19A1s. When they forced us to move to the Beretta's I hated it. There was nothing wrong with the Beretta's, I was just not what I was use to.
So what I am trying to say....decide which weapon you want or can afford and that fits you, then determine how you wish to carry.
I use three different carry holsters, IWB, Serpa, Tactical leg depending on what I am doing.