Who Would Win?

Pietro Django Maximoff

(current) Adventurer, (former) Terrorist, officer of the Inhumans militia, United States government operative

Super Speed, Agility, Stamina, Unarmed Combat, Duplication, Enhance Mutation

Isotope E Crystal (formerly), Avengers Communicator

Avengers, Avengers Academy, Avengers Unity Squad, Avengers West Coast, Brotherhood of Evil Mutants, Dark Ultimates, Excalibur, Holy Guard, Horsemen of Apocalypse, House of Magnus, Romani, Serval Industries, The Vi-Locks, Ultimates, X-Cell, X-Factor, X-Men

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)