Best way to compare two releases of same work?

[Musicophile]

I find different masterings to be hard to tell apart by measurements, if they are in the same format, eg. 16/44 redbook.

 

I use Musicscope to check if high-res albums are not up-sampled

 

Dynamic range is an indicator but not a reliable signal of a better mastering. 

 

So in the end, it's down to you and your ears.

 

By the way, please keep us posted on your preferred version of the Pires Nocturnes. 

 

I'm a big fan as well.