From what I can see (keep in mind that my class knowledge is fairly superficial):

Druid pros are:
- Mobility
- Inervate
- Rebirth (though Resto SHM has Ancestral Prot option)
- Tranquility (though Resto SHM has a similar spell)

Shaman pros are:
- Bloodlust/heroism
- Hex
- Groupwide mobility buff (talent)
- Mobilie healing (though on CD and has mana cost)