Tieflings got a feat (Hellfire blood) that is +1 to hit and +1 to damage on fire/fear spells. I haven't seen a single other feat that gives +1 to hit with spells. After looking at the scaling it looks like you will need to roll 5-15 to hit throughout your career, in which case +1 to hit is roughly equal to +10% damage. Very powerful. The downside is that many monsters have resistance or immunity to fire.
Tieflings also get another nice feat, Ferocious Rebuke, which lets you push targets of your infernal wrath 1 square. (Infernal wrath is a racial encounter power that gives you +1 to hit and +cha mod damage, you can only use it after getting damage)
Tieflings get +1 to hit against bloodied foes
As a wizard, you probably won't be hit too much, but I will bet you at least get hit once per encounter
So, let us say your foes are bloodied, you use infernal wrath on a fire spell, well, then you have +3 to hit with your encounter/daily (fire/fear) power, which is really, really nice.
The extra at will power is nice at low levels, but when you have 4 encounter powers and 4 daily powers, it might not matter so much?
The extra feat isn't a big thing I think, you get plenty of feats, and not many worth taking. (I am not saying useless, I am saying that +1 to damage isn't exactly awesome)