[gsnedders]

But totally undefined and all browsers do their own thing for what's entered in the address bar — there's more consistency in URLs in content, and that doesn't do stuff like normalising '。' but does do the percent-encoded case (for unreserved characters, as the spec says).

Following what the spec says for eqivilance makes sense, at least. Anything drastic is technically treating distinct URLs as equivilant.