Hi Kate,
Probably what I would do is a sample of each. I use the 49 strand beadalon wire in a fine .13 or .15. It is so easy to string, just use the end right off the spool and don't cut it (for the sample). I also have bead stoppers so I can see how tight I want it. Perhaps you could do the same with thread. Whether you use thread and knot every few pearls (like under the gold bead) will make a difference also. I love those pearls, be sure and let us know, with photos, of course!