Halo 5 Ghost levels

Games Halo 5: Guardians
1

What are the Ghost levels and what do they mean?
I think they are -

  1. Basic Ghost?
  2. Sword Ghost?
  3. Ultra Rare Ghost?
    Outside of looks how much better is one than they other? More powerful blaster and shielding?
2

ghost sword ghost and ultra ghosh

sword ghost has higher shielding than normal ghost and ultra ghost has even higher shielding + more powerful blaster

3

[deleted]

4

Thanks