Braun. Price is about the same and a sure fire top 5 pick year to year barring an injury (or HGH lol). McCutchen broke out this year but does not have the established track record making him a slight risk to regress.
Braun easily. I don't see how Cutch's .375 BABIP this year is repeatable. He also spiked in HR/FB while his FB rate actually went down. And a big part of his value is his steals, which means you have to be concerned about his 62.5% success rate.