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.