Somerville vs. Struggler's Knot - by Wykd_Dave
Wykd_Dave from the U.K. shows the differences between the Somerville Bowline and the Struggler's Knot single column tie:
Advantages: Both knots are very secure, give a wide range of pull, and tension the wraps well
Disadvantages: More complicated than the standard Boola Boola ties. Difficult to untie under tension (requires more than one hand)
These knots are great for places where the single column must stay together, such as uplines on a suspension, but wouldn't recommend them to be used as the start of a more complex tie, like the takate kote.