Amen. If you're looking for a new language to learn, why bother with something nearly identical?

My recommendation would be assembly. It's quick to learn and if you play around with it enough you'll learn more than you ever thought possible about computing.

Secondary recommendation (in case assembly doesn't peak your interest) would be Prolog. If you choose Prolog though, give it some time, there's more than what first appears. Just don't think everything that's written in it is "AI programming" (as so many do).

Either way, enjoy.