Beginning with violet, each color of the rainbow symbolizes a different aspect of God's sanctification. Before the first day of re-creation, the Justice of God (violet) had already Judged Satan and the Earth. The Earth was a wasteland and covered in ice as symbolized by the color indigo.
Wonder Woman has superior strength, speed, and agility. She can fly and is trained in hand-to-hand combat. She also had the ability to talk to animals. In addition to her natural superpowers she has some great gear, too:
Both are very mighty super heroines with identical powers and abilities. Wonder Woman is an Amazon princess granted with superpowers by the Greek gods. Supergirl is a super powered Kryptonian who is the cousin of Superman. Diana has certain advantages over Supergirl but Kara has her own leverage too.