Sorry if this is a noob question, but to be honest I am still a noob to this game

Ok so I just reached level 50 with my White Mage and finished the last white mage quest. I received the Healer and Cleric robes as my reward. But when I equipped the Cleric's Robe my mind stat actually went down. And for the life of me I can't figure out why. Here are the stats of both chest pieces, if some one could explain why the mind stat is lowering I would greatly appreciate it.

Cleric's Robe - Lvl 50
Def - 62
Magic Def - 110
Vit - 29
Mind - 29
Spell Speed - 24
Piety - 26

Vintage Robe - Lvl 47
Def - 48
Magic Def - 96
Vit - 12
Mind - 12
Spell Speed - 22
Int - 12