You'd be better off to leave them inside to finish. There could be a chance that the indoor plants would temporarily revert to veg once they got outside depending on the length of daylight currently in your area. Inside they're used to 12/12, but depending where you live, chances are you're not getting that much darkness outside right now.
But on second thought, if you have the same strain inside and outside already, then I guess the ones inside should continue to bud if you put them outside. It's not something that's regularly done, and I'd only do it if you had to get the plants out of the house for some reason. Usually once a plant has started to bud you don't really want to mess with it unless you have to. Taking it outside would definitely cause it some stress.