Which ones? The KM84s or the SM81s?
I went through a test drive on SM81's a long while back and got ocd or something on the USA versions vs the MIM versions, and during that expensive test hobby $$$ hole...
grabbed the Shure PG81 (the old discontinued., not the PGA)....and recall I didn't hear a difference of US vs MIM, then a big surprise was the PG81 sounded so good and were bought off Craigslist super cheap for a pair...$150? pair used.
+ Another nice benefit to the PG81 original - is they had a bigger diameter and fit into a standard 57/58 mic holder, instead of the small diameter SM81 holder that was a pain if it didn't come with the clip. Lower sensitivity a little 3.8mv/pa sensitivity. (SM81 5.6mv/pa). (beware fakes on Temu-Alibaba)
+There's even original cases and US pieces to find, and you can spend >$1000 buying antique SM81's stuff aka the antique US case candy and parts. I spent too much time and money doing that in hindsight, I sold it all as usual. Shure sold very quickly as is a benefit of Shure name brand. I only miss the PG81 though, such a good deal/good sound.
Back then Used US SM81 were $175. New were $250. so it must have been awhile ago I did the mics. SM81 were used on some Eagles acoustics (Eagles used many mics).
Another good budget SDC imo, the MXL 603 ....pocket friendly PAIR $129 now, brand new with aluminum case and Isolation mount holders.
Weezer used them as drum overheads as a name drop from old- a bit more touchy though at Sensitivity 10mv/pa. more like the Neumann K184 at 15mv/pa.
Seems the MXL are liked or spiked though, maybe QC is low?
Shure 81 has its sound, kind of compressed and less range, with the MXL603 more sparkle, higher freq's, picks up more everything. Brand New pair of MXL 603 are $129, with case and Isolation holders. Harvey Gerst liked them, said cut a little 7k, no problem...EQ is a friend too. For a bright room maybe I'd do the PG81's, if the rooms nice the MXL603 or something in the SDC norm.
The Neumann have the old war of 84 vs 184 which is similar to the 87i and 87ai never ending debates.... if these don't sound good its probably your room or something else.
Never owned the Neumann s, still too expensive for my wallet.