The Match and the Expert are two entirely different pistols. The weights are just weights, NOT compensators. No such thing as a nickel Match, stainless and HE finished steel only just like the standard USP.
There are two match weights, engraved and paint filled and painted on. No difference in function but the first ones were engraved and they do show up from time to time and demand a premium for THE COLLECTOR. They offer no functional value over the painted on style.
The early Match pistols came in a cardboard box with two mags and the other Match associated items. Later they came in the black or gray soft case like the Tactical, Expert, and later Elites did (first ELites came in the Euro hard metal case), the Mark 23 was the only one I know of that came from HK in the camo case.