Is this a serious question?
The Beretta has, IMHO, only two slight drawbacks: a spongy trigger and styling that leaves me cold. Otherwise, it is a shooter that never misses a beat, delivers more accuracy than you have any right to expect from a PCC and offers (again, IMHO) terrific ergonomics. It was my first PCC; several years and several thousand rounds later, it's still here while many others have come and gone.
The Sub2000 has exactly one selling point: it folds. That's it. It's a cheap toy; it feels cheap when you pick it up, and it feels cheaper when you shoot it. "Cheap" here doesn't mean "inexpensive"...it means "cheap".
If you are making a decision between these two, then do yourself a favour and at least handle them both; better yet, shoot them. The question will answer itself.