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http://media.comicvine.com/uploads/2/24453/1258851-firestorm___cinar_large.jpg
http://media.comicvine.com/uploads/1/13925/294353-126622-captain-atom_large.jpg

vs

http://media.comicvine.com/uploads/3/35698/829042-thunderbolts028pic1_large.gif
http://media.comicvine.com/uploads/3/33806/1466054-72_magneto_1_large.jpg

Team 1.

^

Depends on which versions of each. Taken at each of their best, team 1, since that would mean a Captain Atom who was destroying and creating universes (vs a Graviton who took down every hero on earth with a thought, to be fair).

On average, tougher to say.