Well, not sure what you mean. I own no modern firearms. I do own 10 percussion revolvers and 1 flintlock (work in progress). Of the 10 percussion pistols, I had one that was a kit, so 11 in total, all Pietta. Other than the kit, whose fault lies with the assembler, not the producer, all function flawlessly. I get nice groupings, never have jams or misfires, except for one with bad nipples. Ordered the tresso ones and it to is a dream. (oh, and I am knocking on every piece of wood I can find after making that statement).
That said, we shoot them way more than our 19th century compatriots did. Way more. So, the Italian made versions see way more action than anything Col. Colt produced. I have never owned and Uberti pistol (do have an Uberti Henry), but I will stand with Pietta anytime. Just my $0.02
Oh, and I have a Pietta 1860 Colt that has easily had 2500 shots through it, it is still tight, and have only had to replace one spring in the 12 years I have been shooting it and that was last year.