I think it would depend on your individual preferences. You're going to have a higher magazine capacity in the Beretta than in the 1911. In return, the .45 will have more energy imparted on a target; however, with +P ammunition, the 9mm is a close competitor. Regardless, you wouldn't want to get hit by either one.
I've not shot a RIA, but I do own both a 92FS and a Kimber 1911. There is a pronounced amount of trigger take-up in the Beretta compared to my 1911 when shooting single-action; but if it's a factor you're aware of and practice regularly so that you are both aware of it and know the reset point of your trigger sear (i.e. - you're used to it), the Beretta is a perfectly capable pistol. In fact I shoot equally as well with it as I do with the 1911. Both are quite accurate. Both pack a punch. The Beretta is more difficult to conceal or open carry in an IWB holster IMHO. Well, maybe "difficult" isn't quite the right word. It's really just a larger framed pistol. Wider, but no heavier than the 1911. The Beretta also has a fixed front sight, and my 1911 has a dovetailed front sight that can be replaced with a night sight - just an FYI.
Owning both - with holsters for both - my personal carry preference is still for my 1911; but both are quite capable as I said before. RIA pistols often carry a smaller price tag than other brands, but many on this board have made very fine shooting pistols with incremental upgrades over time as an alternative to jumping "all in" on a high-priced gun that may shoot far better than they'll ever be capable of doing.
My advice - find a range that carries both. Shoot both. Go from there. In the end personal comfort and repeatable results make a big difference. Shot placement beats caliber in my mind. My take on it.