Schematron and RNG, RNC

Hi so a quick google search of

Embed schematron rules "relax-NC" -- 4 results none of any value
verses
Embed schematron rules "relax-NG" -- answer how to do it comes up

tells me that I'm only going to be able to Embed schematron rules "relax-NG" which is logical enough given the XML

Just wanted to verify that is the case and I wonder generally speaking is RNG more flexible because of it's XML nature?

If I have a project where the users find using RNC more easy to understand however I want to embed schematron rules is it then best that I just write a script to do RNC into RNG conversion and automate the embedding?

Regards

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