I'm well out of all this now, but I'm sure a null test could show any real differencesIt's a shame that it costs so much to send stuff over the pond, even something like a cable which doesn't need a huge amount of padding/protection. Perhaps there's some test we could do ourselves with REW, Audacity, or whatever? Perhaps Linn cables aren't that rare in the USA anyway? The LP12 is well known, of course, and the Linn phono preamps were favourably reviewed in Stereophile, so cables "to match" wouldn't be so unlikely, would they?
Got to say that these days, I use whatever I can find here of the right length. Any cable supporters would be stunned to 'hear' the Amazon Basics RCA cable if they didn't know what was in use (I remember someone who took his apart and was pleasantly surprised how the cable was put together as well as terminated).