Both of the above.
Seriously, I've read that the metallurgy (maybe) and the fitting may average better on the US-made guns. The finish may be smoother on the ones from Brescia.
Heck, you own them: just look them over, recall how each shoots, and think how they feel in your hand.
I don't think price will be much of a factor if you totally
must sell one. But you're going to miss whichever you sell...and probably regret it.
T-Star