Between those? I would say chips. That way you don't have to clean the entire enclosure every time the snake defecates, you just have to spot clean.
With turf you have to clean the whole thing.
I have found with paper, that you have to scrub the tub out each time if you want to get rid of the smell.
My favorite is coconut substrate. It is ubber cheap and does a great job stopping smell and clean up time.