There is a difference between a gathered end and a channel end hammock. The gathered end hammock is how WBBB's are finished and the gather creates a ball of fabric at the ends that the suspension is wedged against (with a lark's head). The through channel is a sewn channel like a Claytor or a switchback or a ENO... where the suspension is threaded through the sewn channel.
The HH hammocks and the clone thread show a folded whipped end. Lots on here like that method. For me I make all of my HH clone hammocks similar to that thread but I use the WBBB style gathered end (see Knotty's sticky thread on the gathered end hammock) instead of the folded whipping. For me it is a great combination and very comfortable.