They sure aren't the exact same casting (for one thing the ports would need to come out different sides of each head, or you'd have one exhaust in the V and one on the outside of the V!)
But they DO appear to be very similar, here is a Bentley W12 head
And here is a VW VR6 head
They look pretty alike to me, at least in terms of overall dimensions, cylinder placement, combustion chamber design, shape of the head face etc. The only major difference I can see is that the water galleries are quite different between them.