I am looking for a new sock particular to race in. (I am foolishly monkeying around with this two weeks before a marathon, which is better than 2 days before.) I just purchased the Wrightsock Double Layer Cool Mesh and the DeFeet AirEator. Any opinions about which is better, particularly over long races? The DeFeet seems to fit a little better, but the Wrightsock feels a little softer. I am particularly interested in blister prevention. Thanks.