Any advantages to bi-wiring speakers vs. single

If you get the bi-wire version you will have more flexibility down the road should you choose to go down that path, or to bi-amp also. No downside that I can see.

No whether bi-wiring makes a difference on this particular speaker ... that I don't know, but I'm sure you will get your share of people taking both side of that question. :)

I used to bi-wire my old MTM speakers. Why? because I had 2 sets of wire and the speaker had 2 sets of binding posts. Was it better than a single wire? Slightly, but not enough to spend tons of money on if you don't already have the wire.

Now I have Apogees and bi-wiring is mandatory. The difference is not even remotely subtle - it is huge.

So YMMV, but without the extra speaker posts you will never know, and as others have said, ask the manufacturer their opiniion.