The Floods don't have Ice Attacks, so it's pretty obvious who would win there. But... the Floods don't have much "life" in them, do they? Lol... it's a paradox..
And for the second question, Samus would be able to handle the flood well. She could just whip out her flamethrower and burn them to hell. But Master Cheif doesn't have any Ice Attacks either.. so... uh... haha.
