Buy the Beretta. It isn't just LOP, but cast and drop at comb that are the stock fit parameters. Presumably you are a right handed shooter, as the Beretta should have a right handed cast.
A lot of folks, including myself, make a big deal about fit. However, as a recreational shooter, and someone new to the game, fit is not a paramount issue:
1) You don't know what "fit" actually is.
2) There are other aspects to learning to shoot on the wing that need to be honed, regardless of fit.
My first "sporting" shotgun was an 870 Express. It was cheap, got me into the game, and allowed me to become reasonably proficient at skeet and trap. I used the same gun for upland and waterfowl. I wasn't aware of "fit" at the time.
Fast forward a few decades, and I have numerous over and unders (B guns). I now know what fit it is, and to be frank, as long as the cast is correct, I shoot all of them equally well. If I shoot one gun for a protracted period of time, my familiarity with the gun will benefit my scores. If I switch to another gun, it may take me a half box of shells to get on track. Just for kicks, I tried my 870 recently - it has a neutral cast and shallow comb, and after a few shots I had adjusted. (However, the hockey puck recoil pad has its shortcomings!)
So, what is the point to all this? You cant go wrong with any of the B guns. The Beretta gives you do all flexibility (chokes, 2 3/4 or 3 in steel shells) you need, and gets you nicely in the game. If for whatever reason, you decide you don't like it in the future, you can probably sell it for more or equal to what you paid for. Just make sure that any O/U you buy is not "loose" from excessive shooting. As a minimum, the top lever should be resting right of the 6 oclock position.