I'd recommend Goji to most users. The one I wrote has better performance, but also less features.
Goji does very well given it includes a request context implementation as well. I've been porting over an existing net/http + gorilla/mux app and like its design.
I use the standard one for quick/low performance, things, but Julien's HttpRouter for high performance needs. I've never needed any of the advanced features that the other routers provide- but do care very much about performance.
Slightly off topic: Would httprouter + negroni be a reasonable replacement for Goji?
I don't mind someone recommending their own work when the rationale is backed by hard data.