First of al, I am no expert, I made this table by looking at photos and exhanging info online and using reference published in various books.
Something I noticed just right now:
The 6R has the original turret basket and not the larger IDF variant. I will correct it and repost the table.
Nikos, is the FCS the ONLY difference between the Magach 6B 'Gal'and the 6M ('Gal' vs. 'Nachal Oz', respectively)?
The 6M is based on the M60 slick whilst the 6B Gal on the M60A1. But the configuration is almost identical except the FCS, as you correctly stated.