are "LONDON" pressings made in the UK, inferior to the Decca pressings

Edgeware, thank you for sharing your wealth of knowledge of the subject. It’s possible that I am thinking of US pressings under the London label, and that would explain a lot. I will go through my collection and see what I have here because I still have anything I ever bought.

It's interesting to read this thread about Decca vs London LPs, because it runs counter to my memory of the 1970s, when I was regularly buying classical LPs new from places like Tower Records and other emporia in the Washington, DC, area.  I had one friend who probably bought 4-5 LPs for every one that I bought, but we regularly conferred on sound quality.  As I recall, we both thought that Decca LPs were far superior (quieter, mostly) than London-labeled LPs containing the same performances.  Had something changed by the mid to late 1970s, or were we just deceiving ourselves?  I am not a "collector" per se, and I could not care less about relative market values.  We only obsessed about SQ.