[The Warrior]
same, but increases unarmed damage by 10
and unarmed armor penetration by 10%

The Steed:
increases speed by 7%
increases attack speed by 7%
increase Stamina by 70 pts

The Lady:
Increase Stamina by 30 pts
Increase Health by 30 pts
Increase Magicka by 30 pts

The Lord:
Untouched

[The Thief]
1H and Marksmanship armor penetration increased by 8
Sneaks is 15% better
Lockpicking is 25% better (gains 20 lockpick expertice)
Pickpocketing is 35% easier

The Tower:
now also makes you 50% more resistent to stagger

The Lover:
+20 to Speechcraft
learn crafting skills 20% faster
Alchemy, Enchanting and smithing are 20% better

The Shadow:
Sneaking is 25% better
Muffle 1 pts (your movements are silent)
Sneak attacks deal double the damage (both melee and ranged)

[The Atronach]
same, but now there's no alchemy  debuff
food buffs works normally except for the nutrition (so eating food won't grant instant stats)

The Mage:
Spells are 8% stronger
increase magicka by 80 pts

The Ritual:
+1 Summon or resurrect minions
Summons and minions duration is increased by 100%

The Apprentice:
Magicka regeneration buffed to 300%
Weakness to magic reduced to 15%

[The Serpent]
Now the damage is irresistible
damage buffed from 25 to 30 pts of damage

Now being not only great to take on early to mid game bosses but will also help a lot when dealing with regenerating enemies, reducing their regeneration by a flat 30 pts per second