I haven't heard the Spiral Ear so I can't comment on that. It's been a while since I heard the Miracle but from memory it is somewhat similar to the LCM-5. Definitely in the same general ballpark in terms of sound signature. Again, from memory, the Miracle may have slightly more prominent sub-bass impact, while the LCM-5 has faster and more transparent upper mids and highs.
Both are really good.