Rome's late hit was fucking reprehensible. What a cock-holster.
Who lost out more - Vancouver losing Rome or Boston losing Horton?
Pretty obvious answer to that question. Aaron Rome has close to no impact, he's just a body on the ice that eats up some minutes and hopefully doesn't screw up. Nathan Horton is second in the playoffs to only Zdeno Chara in +/-, he has 17 points (good for eighth in the playoffs), and is tied for second in game-winning goals (behind only David Krejci), which is exactly what Rome was thinking when he laid that dirty hit on him.
P.S. I know your question was probably rhetorical, I just wanted to answer it anyway.
P.P.S. Aaron Rome is a douchebag.