winning vs learning…. pretty much any AQ wire can be configured in a true external biwire configuration, including a factory shotgun biwire configuration…and yes, they cost 2x.
I don’t recommend an internal biwire configuration, not for AWG reasons, but because it negates MUCH of the advantage of biwiring which is to get the HF wire 3-4” away from the expanding / collapsing field of the LF wire.