V12 exhaust manifolds

[V12Virage]

I'm looking to pick up an extra set of exhaust manifolds for my Virage to deal with the primary catalysts and note that the part numbers for the DB9/DBS/Virage/Rapide version differ from the DB9.2/Vanquish version. Does anyone happen to know if they are effectively interchangeable?They appear identical, but there may be something that I'm missing...