Alexandrite or Diode Lazer for thin and fine hair on light skin? (photos)

Generally I am blonde, on legs and bikini have thin and fine hair, but both blond and half darker( not very dark, but long ones), my skin is light color. I want to decide which one is better for this type of skin : Alexandrite Lazer ( Candella Gentlelase Pro-U or Polylase LP) or Diode ( Soprano Ice Platinum) .