I have seen some very strong outdoor that I would have thought was mid quality indoor if I didn't know. But to this day I have not seen any outdoor buds that match my indoor stuff or any of my other buddies stuff. Not saying its not possible, just haven't seen it in my few years of growin.
The thing about indoor is just having control over every single variable for the grow and that's what I like. I would have some outdoor going right now but not worth the risk of neighbors smelling and putting my indoor in jepordy. Once I buy my big property in lake tahoe, I plan on building a big greenhouse. Gets a lil too cold there.