Needledrops and demo tracks

The frequency spectrogram is different for each stage.
So the RIAA correction curve on the stages is a little different - not uncommon for phono stages and often responsible for differences.

 

Very interesting, are you able to extrapolate further?

 

Yes, it might explain the great bass you perceive from one of them


Take a look here.
Look at the bass end in particular, and one seems to have a little more going on at the extreme top end. There is a good 4-5db difference in some places.\

 

Oh yes, definitely - how interesting. Is the lower trace from the short title version then?

 

bottom one is the new phonostage.