Well, it's not really a law, but attorney has suggested that CBP normally don't terminate H-1B at border vs TN as H-1B does have a dual intent, so they can't j

Well, it's not really a law, but attorney has suggested that CBP normally don't terminate H-1B at border vs TN as H-1B does have a dual intent, so they can't just say you have an "immigration intention" to deny your visa at border. And that's definitely an advantage over TN.