Added benefit is sish handles all of the hostname/certificate provisioning on its own and does things like internal tunnels, TCP tunnels, and gives you a little website debugging tool as well. All in a single binary :)
Disclaimer: I'm the author of sish
Not to downplay the excellent work you've put into sish (which does have many nice additional features), but SirTunnel is basically just a wrapper around Caddy+SSH, so it also provides any features Caddy includes such as auto certs.