This could be debated, ad infinitum.
If you want a true matched pair (the definition you have already provided), or as close to a matched pair available today, Fabbri would be the choice - all machine made and identical as then can be. Or, save a whole bunch of money and buy two Browning, Citori's with identical specifications (except for serial numbers and wood), they will be just as close.
Whoever says they can make a "matched pair" is being a bit disingenuous - it is impossible to do because of the physical laws (and theories) of the universe.
