They're probably all the same, in fact I'd personally be biased *towards* testing equipment where poor noise suppression would interfere with operation and is likely to be detected by the user. The old radio equipment was also *very* sensitive to electrical noise, so aside from being old and possibly in need of new capacitors, may also be better made than a modern audiophile power supply.
In the end it's all about producing the cleanest DC sign wave possible and keeping that perfection going under increasingly heavy loads (so do pay attention to voltage and current ratings).
In the end it's all about producing the cleanest DC sign wave possible and keeping that perfection going under increasingly heavy loads (so do pay attention to voltage and current ratings).