Does Erin go brough mean the same as ireann go br ch?

No, "Erin go bragh" and "Éire go Brách" do not mean the same thing, though they convey similar sentiments. "Erin go bragh" is an Anglicized version of the Irish phrase, meaning "Ireland forever." On the other hand, "Éire go Brách" is the Irish version, also meaning "Ireland forever," but it is more authentically rooted in the Irish language. Both expressions evoke a sense of patriotism and love for Ireland.