Each class has there own set of attributes that have different effects from other classes, below will show you what each attributes effects and classes starting attribute bonus.
Below are tables for each stat showing how they effect each class..
+2 Constitution & +2 Strength or +2 Wisdom.
You have increased damage resistance to Damage Over Time(DoT) effects.
You have increased resistance to Knock and Repel effects.
+2 Dexterity & +2 Intelligence or +2 Wisdom.
Increases your chance to Critically Strike by 1%.
You have a 10% resistance to effects that Slow your movement.
+2 Constitution & +2 Charisma or +2 Wisdom.
Grants +1 to non-class Ability Score.
You are just naturally better at many facets of life, gaining +1% Deflect, +1% Critical Severity, and +1% Gold Find.
Your Critical Hits do an additional 5% damage.
You gain a 10% bonus to Runspeed for 3 seconds when you enter combat. This effect can only occure once every 20 seconds.
Your fearless nature increases your resistance to Crowd Control effects by 10%.
Your small stature and quick movements grant 3% chance to Deflect incoming attacks.
You gain an additional Heroic Feat point at levels 10, 15 and 20.
Increase your Defense by 3%.
You deal an additional 5% damage to targets below half health.
Whenever you are hit, you have a 10% chance to lower the Power of the attacker by 5% for 5 seconds.