I like the Muslin because it comes with the stand and case.
I like the other because it's *24 FEET LONG* that would allow me to keep my subject well away from the bkg.
You buy it by the metre (or yard) from you local studio supplier. Easy to hang and easy to light. The rolls are large, but I've no idea how much is on a 5 foot wide roll (but much more than 16 feet, because that's what was left at the time I bought and that's what I got).