Zamula gives you solid defensive impacts without committing a ton of Penalties. But basically nothing else.
Hagg gave you nothing. At his worst, Hagg was a negative in basically every way we have to measure a player’s effectiveness. He’s my best guess at the worst Flyer Defenseman we’ve seen in the last ~25 years given an appropriate threshold of minimum Games. I have zero doubt he was significantly worse than AMac for example.
I fondly remember a couple people insisting Hagg was better than Ghost, based on 1) Hakstol saying so, and 2) the team won!
Upon being asked how Hakstol is a suitable authority, we were told to never question his authority. Upon being asked what exactly Hagg did to contribute to any wins, we were told "They won!"
I've engaged in a lot of sports discourse. In the NCAA, which is a septic tank, and among DC fans who actually defended Bruce Allen. The Hagg defenses remain the lowest point for sports discussion I've been a part of.