Edit: Okay, so I'll preface this by saying sometimes they match the Ultimania stats (which give stats at Lv1, every ten levels, and the max level), sometimes they are way off. I do know that some changes were made from JP>EN so this could be a product of that. Also I'm suspicious of my math.floors, I may have added them at random to see what gave me the right results.
I compared french PS and japanese version, here are the differences (in hex):
Tri-Point
Mag (or vit?) | JP: 01 14 64 02 | FR: 01 14 23 02
Left Orb (or Right?)
Spd | JP: 00 01 14 0a | FR: 00 01 05 03
Right Orb (or Left?)
Spd | JP: 00 01 28 0a | FR: 00 01 0a 03
Jumbo Cactuar
HP | JP: 00 00 3c 00 | FR: 00 00 1e 1e
Anakronox
HP | JP: 00 00 04 1e | FR: 00 00 03 1e
Left Probe / Right Probe
Spd | JP: 00 03 32 06 | FR: 00 03 1e 06
Trauma
Spd | JP: 00 01 24 01 | FR: 00 01 18 01
Fujin (119)
Str | JP: 46 05 55 82 | FR: 41 05 3c 82
Raijin (120)
Str | JP: 50 05 78 82 | FR: 50 05 6e 82
Thanks for your answers JWP and JBedford128 ! that is really helpful