I think they're both overrated. Rogue One's Vader fight scene seems like gratuitous, tacked-on fan service, and they don't earn the payoff of their characterization of Jynn. Come to think of it, I can't really think of any real characterization she has. She is presented as if she's this snarky, jaded outlaw, but she spends the whole movie talking about Hope and in one of her first scenes with agency, goes out of her way to protect a cute little kid. She basically one of those blank protagonists you can project anything on to. And the Leia double looked nothing like her. Also, for a battle that was described in the opening crawl to Ep IV as the rebel ships winning their first victory against the Empire, it didn't look like much of a win.

The Mandalorian is pure fluff with dubiously executed fight scenes that don't really stand up when you think about them twice, and, like Rogue One, a character that really isn't established at the starting point they claim, skipping ahead all too quickly to hero mode.