AQ Speaker Cables: Gibraltar vs. Mont Blanc?

I am trying to choose between Audioquest's Mont Blanc & Gibraltar speaker cables. The Mont Blanc's have been discontinued, so it's hard to get a read on how they compare. Can anyone give me a sense of which is the better cable?

I am contemplating a single bi-wire set up - quad connectors at the amp & dual at the speakers. Would either of these cables be better suited for this set-up?