Talisman subtypes - uneven stat distribution?

[SimpleHuman]

At level 1-4 it misleading appears like talisman subtypes are pretty evenly balanced and you get to pick def vs m.def.
However, at level 5 there is a pretty big stat difference between subtypes.

Consider these strength and health talismans. There is almost a 50% increase in the relevant stats, (451 atk to 696 atk) or (4527hp to 6977hp)
It seems like the game is skewing stats where one point in M.Def and Magic is worth several Hp / Atk / Def points.

Strength Talisman
Safeguard:
Hp - 1142
Atk - 451
M. Resist - 114

Fierce:
Hp - 1632
Atk - 696
Def - 163

Health Talisman
Ward:
Hp - 4527
Magic - 114
M. Resist - 114

Overwhelming:
Hp - 6977
Atk - 163
Def - 163