These are tragically bad - literally worse than the 0+4 AC mage alternatives.
The masterwork coat, gambeson, leathers, jerkin, and dress are all the same, except:
- The leathers have less AC, no spell slots, and is ten times as heavy.
- The coat and jerkin have Spellcraft.
If these are just meant to be aesthetic, it would be nice if they were all put on even ground as there is almost no reason not to take the coat or jerkin. The leathers should have the spellcraft ranks, +2 AC, and a larger stealth bonus than the others for weighing so much - or some other tangible benefit.