Good thing about the belt loop variety is that you can adjust the fit, and crank it tighter as necessary - but you have to be wearing a belt. Obviously, a more-snug fit also pulls the gun closer for better concealment.
However, the paddle can be worn without a belt, which greatly increases your wear/carry options. I'm typically a big fan of the paddle holster design for this reason, so long as the molded holster isn't sticking way out away from your body, making effective concealment more difficult.
Depending on how you dress on a daily basis, i.e. wearing a belt 90%+ of the time, maybe the belt loop design would suffice?
** I'd be surprised if the kydex holsters don't accommodate both the Beretta and the Taurus, especially considering the most significant difference in design is the location of the safety/decock - which would likely not be IN the holster of either. **