I am curious if someone could explain how a project in Go would compare to a project in Python or Ruby + a fancy array of custom C modules? This implies that it

I am curious if someone could explain how a project in Go would compare to a project in Python or Ruby + a fancy array of custom C modules? This implies that it is possible to implement the nicer features of Go (for example concurrency support) in the modules supporting these languages. Or instead making kickarse fast compilers for higher level languages? Is it too simplistic to say that at one end you have expressive languages designed for humans and at the other you have low level languages designed for speed? edit: not meaning to insult humans who like fast languages.