Overall, they're quite balanced. Both have powerful defensive spells, but while the Priest's spells are more specific (defend against a specific attack) the Wizard's spells are generic - they defend against spells. It's much easier to dispel a Wizard's protections, because there are many spells which do the trick (though Dispel Magic will take care of both of them).
On the offensive side, the Wizard has a lot of direct offense, either damage (Invocation/Evocation) or denial (enchantment), while the Priest usually have enchantments for party members, allowing them to fight better (Bless, Chant) or fight longer (the various heal spells, Ressurect Dead).
Of course this points are generic, and there are exceptions. You can dual class a wizard to a cleric or vice versa, though when it comes to that I prefer multi-classing with a non-human race, but it depends on your style. |