Who Would Win?

Kara Zor-El

Superhero, Kryptonian survivor

Flight, Super Strength, Super Speed, Agility, Stamina, Invulnerability, Intellect, Blast Power, Healing, Weapon Master, Super Sight, Super Smell, Super Hearing, Invisibility, Phasing / Ghost, Radiation, Unarmed Combat, Sonic Scream, Tracking, Swordsmanship, Levitation, Omni-lingual, Vibration Wave, Heat Vision, Wind Bursts, Marksmanship, Energy Absorption, Stealth, Berserker Strength, Leadership, Longevity, Ice Breath

Kryptonian battle armor, red sun energy weapons (rarely)

All-Star Squadron, Crime Syndicate of America, D.E.O., Daily Planet, Female Furies, House of El, Insurgency, Justice League (Cry For Justice), Justice League 3000, Justice League of Amazons, Justice League of America, Justice League United, Justice League Unlimited, Justice Society International, Justice Society of America, Kent Family, Kryptonian Science Council, Kryptonians, Legion of Justice, Legion of Super-Heroes, Monarch's Army, Nightwing & Flamebird, Outsiders, Pet Club, Phantom Zone Inhabitants, Red Lantern Corps, Secret Six, Super Best Friends Forever!, Super Hero Girls, Superman Family, Supermen of America, Teen Titans, Tiny Titans, White Lantern Corps

Mar-Vell

Air Force pilot, Avenger, cosmic protector

Energy Absorption, Photon Blasts, Flight, Superhuman Strength, Superhuman Durability, Binary Form, Cosmic Awareness

Kree-enhanced suit — relies on cosmic energy absorption powers

currently Avengers, former companion to the X-Men (as Carol Danvers), former member of the Starjammers (as Binary), Former Avenger (as Ms. Marvel)