My recommendation would be not to go especially now that taco Maria closed but I would say Hue Oi and Brodard are both better Vietnamese than you can get in NY (Brodard is practically a factory). Others worth visiting in OC include Chaak, Knife Pleat, lots and lots of sushi. I like omakase by Gino. If you’re traveling to LA there’s a ton to eat and I can make other recos like Sushi Inaba and Kin Kan.