Why don't we make a list of best pressings ?

I didn't compare many but here are a few. When I say Japanese original I mean Japanese first release, same mastering as the original in the country where it was recorded. In descending order.
A. Miles Davis - Bitches Brew
1. Japanese original promo stereo
2 -3. Japanese original stereo
2 -3. US original 360 sound.
US and Japanese sound slightly different, I listen to both.
B. Miles Davis - Pangaea
1. Japanese original promo
2. Japanese original
C. Mahavishnu Orchestra - The Inner Mounting Flame
1. Japanese original.
2. Canadian original 360 sound.
 D.Mahavishnu Orchestra - Birds of Fire
1. Japanese original promo
2. Japanese original
E. Mahavishnu Orchestra - Visions Of The Emerald Beyond
1. US original White Label Promo.
F. Al Di Meola - Cielo e Terra
1. Japanese original promo
2. Japanese original

I have or had other pressings of all these albums, they are worse to various degree. Canadian original 360 Sound  Bitches Brew also sounds good but I preferred the US and Japanese. Japanese first release of the "Visions..' by Mahavishnu Orchestra is something that I don't like. This is rare in my experience when it comes to records from 70s.

Not sure exactly what info you are interested in. You might try discord.com. They have a pretty decent database. 
Sorry. Spell replacer got me. Discogs.com
@akiravelvet ...I do not chase just Japanese pressings to compare to originals but I do try to see if there was a decent release from Japan, it’ll usually take me to several different forums.
Original release, discogs, allmusic, etc.. Few members got me into jazz female vocalists which also took me to another site > allaboutjazz

What inna is suggesting is a good idea for the augon forum. Quite often I do not get my entire thought into text.
There are people here who did compare multiple pressings. Often you don't even need high end equipment, just a good one. 
Japanese vinyl from 70s itself is of very high quality, very quiet, but it doesn’t always sound best.
Say, I didn’t compare Pink Floyd’s WYWH pressings, I only have original Japanese and it does sound very acceptable. Not very good recording, though. Oops, I did compare it to original German, Japanese was better.