An extremely long and detailed review with comparisons is available here:
http://www.head-fi.org/t/662339/earsonics-sm64-universal-iem-review
Unfortunately the comparison does not include the Shures, but it does have the Ultimate Ears UE900 and Etymotic ER4S, among others.
http://www.head-fi.org/t/662339/earsonics-sm64-universal-iem-review
Unfortunately the comparison does not include the Shures, but it does have the Ultimate Ears UE900 and Etymotic ER4S, among others.