@voiceofvinyl,
I certainly don't have all the facts, but apparently the industry practice was either to send lacquers to foreign markets (used on location to press the discs) or to send second generation copies of the master tape and have the mastering done over there (usually under some licensing agreement). Even in those days it seems that record companies were reluctant to ship around their original master tapes. This might explain why original pressings made in the home country of the record company usually sound best. And also why in the above comparison of the Albeniz the US pressed LSC sounds slightly better than the UK pressed SB.
But to complicate matters the agreement between RCA and Decca also involved recording. Many of RCA's recordings made in Europe (mostly with London orchestras or the VPO in Vienna) were made by Decca recording engineers like Kenneth Wilkinson. Obviously Decca did the mastering and pressing of the UK issues of these recordings, but did they also use the master tapes (which they made themselves)? I have no idea.
So I did another experiment: Berlioz' Symphonie Fantastique by the VPO conducted by Pierre Monteux and recorded by Decca. In this case the UK pressed SB-2090 (1M,2L lacquers) sounds better than the US pressed LSC-2362 (2S,4S lacquers). This outcome suggests that Decca had access to the original tapes, but of course as legal owners so did RCA.
I admit to speculation here, but IF both companies used the original tapes for making these records, the Decca mastering engineers had the edge over their US collegues. But perhaps this is totally wrong. Perhaps a 1S/1S copy of the LSC sounds best of all, who knows?
So there's really only one way to find out: listen for yourself! That's just the advise you were waiting for, right? ;-).
I certainly don't have all the facts, but apparently the industry practice was either to send lacquers to foreign markets (used on location to press the discs) or to send second generation copies of the master tape and have the mastering done over there (usually under some licensing agreement). Even in those days it seems that record companies were reluctant to ship around their original master tapes. This might explain why original pressings made in the home country of the record company usually sound best. And also why in the above comparison of the Albeniz the US pressed LSC sounds slightly better than the UK pressed SB.
But to complicate matters the agreement between RCA and Decca also involved recording. Many of RCA's recordings made in Europe (mostly with London orchestras or the VPO in Vienna) were made by Decca recording engineers like Kenneth Wilkinson. Obviously Decca did the mastering and pressing of the UK issues of these recordings, but did they also use the master tapes (which they made themselves)? I have no idea.
So I did another experiment: Berlioz' Symphonie Fantastique by the VPO conducted by Pierre Monteux and recorded by Decca. In this case the UK pressed SB-2090 (1M,2L lacquers) sounds better than the US pressed LSC-2362 (2S,4S lacquers). This outcome suggests that Decca had access to the original tapes, but of course as legal owners so did RCA.
I admit to speculation here, but IF both companies used the original tapes for making these records, the Decca mastering engineers had the edge over their US collegues. But perhaps this is totally wrong. Perhaps a 1S/1S copy of the LSC sounds best of all, who knows?
So there's really only one way to find out: listen for yourself! That's just the advise you were waiting for, right? ;-).