Each commander will add his own touch. NATO brings a set of procedures and policies and trained individuals, with whom you've been working before, for a while, working together, whereas a UN mission may bring a non-NATO partner who you may not have worked with before. To me, I will always lean toward NATO, because we speak not the same language but a similar language, and we share procedures and processes that we've trained together to do, whether individually in our own home nation or as a group as an active member of the NATO standing force. Therefore, I will always lean toward that.
That does not mean the UN is not a good thing. I'm saying that NATO members have probably worked together before, whereas a UN mission would bring new partners that may not necessarily have worked with us before, and will require the commander and his team to adapt. Again, as I stated in my comments, it's for us to adapt to the situation.