Japanese Zep CD's-the sound remains the same

There are occassions when the same source tape can be mastered so that it sounds different e.g louder or even when it's tweaked in some fashion (for instance the Nick Drake remasters have different eq's/mixing)but for me that is remastering.
In the case of the Yes Japanese discs (which are HDCD's)there is a noticable difference-not least in volume.

However Jay Douglas please pay attention to this-I have both the Grey box set and Physical Graffiti on Japanese import and they are IDENTICAL.

When you've heard both get back to me on the subject or alternatively give us a detailed analysis of what Zep discs sound better or are the same.
Your post is ambigious at best and does not nail down the specifics.

I'm sorry Jay Douglas there may be truth in what you are saying in general terms however I can assure you these discs are identical (Physical Graffiti)and THAT is the point of the post.
These Japanese imports are not cheap and when members on this forum suggest that there is sonic benefits to be had then they really need to stand by their statements.