Small question about Neptune and Gouma helm stats

So these helms only drop once per save file and I wanna know if they're randomized per save or hardcoded into game?

Stats for Neptune on my save:

• Memory - 220
• Weight - 100
• VP - 3500
• B.Def - 220
• P.Def - 20
• L.Def - 400
• B.Resistance - 120
• S.Resistance - 120
• C.Resistance - 132
• Locl-On range - 120
• Shooting perf- 32
• Stamina efficiency - 135
• Femto efficiency -135

Stats for Gouma on my save:

• Memory - 412
• Weight - 188
• VP - 5150
• B.Def - 300
• P.Def - 0
• L.Def - 120
• B.Resistance - 120
• S.Resistance - 235
• C.Resistance - 146
• Locl-On range - 55
• Shooting perf- 18
• Stamina efficiency - 170
• Femto efficiency -92