Hi,
I don't have experience with biwiring, but to my logic there's no real benefit of biwiring as long as you are driving the speaker with one amp. At the end, it's the same as using a thicker wire since wire circuitry is the same. It's just you split the wire at the amp or at the speaker. However, if you use two amps, one drives hi freq and one drives low freq, (i.e. biamping) the sound may be better as the amp drives less load, but that's also subjective.
Sorry if that doesn't really answer your question.