I can only speak from my personal experience with several different makes of repro revolvers.
Uberti has a longer reputation for better quality control. I got an Uberti pocket police a few years ago and just recently a Pietta Remmie. I was impressed with the Pietta, because their reputation was hit or miss until just a few years ago. The Uberti is definitely better fit and smoother but not by a substantial amount. The Pietta cylinder that came with my remmie, has one chamber mouth that is slightly out of round, right out of the box. by only 2 thousandths, but strange and probably enough to affect accuracy from that chamber.
I have a Ruger Old Army and that is like a Cadillac produced tank compared to both the uberti and the Pietta.
I understand that the two German made revolvers are the Rolls Royce models. For that reason, the German made revolvers are far more expensive and rarely seen here in the US