Step down sun visor question: Prefer steel or aluminum?

I've got two factory Hudson step down sun visors -- the ones that are correct for '48 to '53 Hudsons. I don't need two of them, so I'm thinking about offering one of them for sale. They are both in the same excellent condition. One is steel and the other is aluminum. They both have their tired original factory paint. I don't have a particular preference for which one I keep. Do any of you see an advantage in one over the other? James Sheehan, Mpls, MN