It will be 1 point shy of AC
Saves I think it would be just about even... regular charisma and halfling luck on will and possibly reflex saves evens out dwarven spell defense, and you dont need to put nearly as many resources into dex.
HP will be lower maybe 350-375ish if I were to gestimate (though after playing my dwarven paly/fighter w/ 316 for a while I dont really feel the need for too many more)
Casting you will lose quite a bit of sp (my paladin sits at 396 sp I think which is enough for resists/divine favor/virtue) but you wont be able to cast heal spells, though they break CE so are inconvenient anyways except for between fights when wands are just as good.