Wolves:

Pros:
• Climbing/running on walls
• Increased movement speed
• Heavy melee damage
• Bonus HP
• ...

Wolves:

Pros:
• Climbing/running on walls
• Increased movement speed
• Heavy melee damage
• Bonus HP
• Advanced Wolf species gain extra abilities

Cons:
• No ranged attacks
• Can be slowed by "stun" weapons
• Vulnerable in open spaces

Humans:

Pros:
• Use of weapons
• Wide variety of weapons available
• Able to attack from range/snipe
• Stun: Some weapons stun wolves, slowing them
• Available in all modes (though not all teams)

Cons:
• Vulnerable in melee combat
• Slower movement speed