They would indeed by asymmetrical - no chance you could swap one for the other from side to side.

Although that diagram looks as if it infers it, I would also be very surprised if they are connected in the middle...there's too much of a maintenance headache to maintain if it were one and there really wouldn't be much advantage to connecting them together, structurally.

And me too - 2 knots? 2 Knots is nothing to sneeze at but it looks like it's definitely more at times.