There is no doubt that Jesus commands angels. Michael also commands angels.
But that is where the parallel in Scripture begins and ends. Daniel calls Michael "one of the foremost princes", you can hardly be "one of" a group of something unless there are others of that same group. It matters very much, but only for one reason: It is a clear-cut example of Jehovah's Witnesses holding as undeniable truths teachings that the Bible does not directly support.
They have employed human interpretation to the Scriptures and invented a "truth" instead of candidly admitting that they don't know. It is an example of the hubris of the Governing Body gods served by all loyal Jehovah's Witnesses. Going far beyond what is written is a favorite pasttime of the Governing Body and its predecessor, the Society.
That Jude calls Michael "the archangel" could be to separate Michael the archangel from the many other Michaels known to the readers of Jude's letter. It does not necessarily indicate that Michael uniquely holds that title. Not to mention that the book from which Jude's account came (Enoch) was excluded from the Bible canon.
It matters to the degree that teachings purporting to come from the Bible and declared as Scriptural truths should be actually from the Bible, and this teaching is not from the Bible.
—AuldSoul