Any advantages to bi-wiring speakers vs. single

Biwreing may or maynot benefit since you're adding a reactance to crossover equation.
Biamping is what biwire terminals are for to benefit.

If you are not going to biamp then it is just a hassle to have biwire imho. Need biwire cables and some agrue you need true biwire cables or double runs for best sound. Others say jumpers are better and then you have to choose which jumpers sound best...

Opens up a lot of possible directions and results. Some like this others feel it is a hassle. If you like to tweak and mess with gear, then biwire is good. If not, then better without it.

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.

You won't know until you try it

If biwiring doesn't sound good I usually change the speakers. ;)