What is the difference between Black Souls and White Souls? [duplicate]

Possible Duplicate:
What are the advantages and disadvantages of each version of Azura's Star?

I am on the Star of Azura quest and I am at the part where you need to decide whether you are going to fill it with Black Souls or White Souls. What's the difference?

Solution 1:

Black souls are NPC souls (bandits, city guards, merchants, farmers, etc.); white souls are everything else.

Normally you cannot capture a black soul unless you have a black soul gem (which are hard to find), or the Black Star. Either version of Azura's Star will function as a reusable grand soul gem, however only the Black Star will allow you to capture black souls (and, although it may be a bug, it also will capture white souls).

Regardless of level, a black soul is equivalent in power to a grand soul, making it easier to get your most powerful enchantments by taking out easy bandit camps. My personal recommendation is to get the Black Star, especially with its current behavior to also capture white souls.

Solution 2:

Black souls are human souls. White souls are everything else. Black souls are a lot bigger then the white souls. Bring the star to the wizard so you can use the black souls.

Solution 3:

The dark star can be filled black souls and white souls so it's recommended to get him instead of Azura's star.