What is the difference between Gandalf the GREY and Gandalf the White?

Related questions

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2. Why is Gandalf weaker than Sauron?
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4. Who is more powerful Dumbledore or Grindelwald?
5. How did Richard Harris from Harry Potter die?
6. Who is Ian McKellen's husband?
7. Is Captain Picard Wesley's father?
8. Did Gandalf die in Moria?
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Tags

1. #wizard
2. #robes
3. #second
4. #ranked
5. #their
6. #istari
7. #color
8. #wizards
9. #gandalf
10. #saruman
11. #because
12. #powerful
13. #white
14. #possibly
15. #still