Advice regarding extending RedCloth

[andrew thornton]

Hello,

I am in a bit of a bind. I need to reliably parse mediawiki markup to
html, and the only parser that I can find (mediacloth) has a lot to be
desired, so I would like to extend something that works and parse
mediawiki markup. My question to this list is should I start working
on RedCloth or SuperRedCloth or is there a difference as far as
extending them? Also does anyone know of a write up that outlines
extending RedCloth or SuperRedCloth with new markup? I apologize if
these questions are a bit rudimentary for this list, but I appreciate
any and all input and help.

Thank you