Braided SS vs. Hard Line

It's the RUBBER stainless lines that expand, and of course give a spongie pedal. That's why you MUST use teflon, it doesn't expand under pressure.
If the lines you have access to have normal A/N fittings, they are likely rubber, and I would NOT use them.
You can usually tell if rubber or teflon line . The rubber is fairly flexible and can be used in a fairly tight bend. Teflon is stiffer (and lasts ten times longer) and can't be bent as tight.
Edit: you really want "on the cheap" brake parts on your car?