I went from a carbon bar to an aluminum bar when I under-torqued the carbon ones, and they slipped. It was a bummer, not just for the bank account, but also for ride quality. But it wasn't night and day, it was more like night and the period right after the sun sets, before twilight. Unless you do most of your riding in the drops, it might not be worth it. You should borrow your friend's bike and confirm or invalidate my prediction.

Right. If you turn green and double your size ( ripping your shirt to tatters ) when you get angry, and also if climbing hills makes you angry, then your Incredible Hulk strength might snap your bars.