Using wands in both Universal resorts

Can Harry Potter interactive wands that you buy in the Orlando park also work in the LA one?

Yes. They just reflect the signals being transmitted by the displays. There’s nothing really “working” inside the wand. They stop “working” when the reflectors get knocked out of whack. However, all wands have a lifetime guarantee, so if you have a wand issue walk into Ollivander’s and they’ll get you a new one.