I want to say Theodore as someone still annoyed that Pietrangelo has been weaker than advertised and for the money he makes but he's still unquestionably a strong defenseman.
It really is a toss up between the two on any given night. Theodore, in spite of his numbers, had an off year in terms of his overall game.
It's tough to say. All I'd say is if Vegas had to lose one for some reason, I'd rather lose Petro at this point. Theodore's utility as an engine for Vegas' transition game is underrated. And considering how much Vegas relies on rush offense, he's more valuable to the team. Slightly. We'll see how things are under Cassidy.