Good info GeoffHa - so maybe no re-print but a later printing?
I agree with you hy-brasil. Tremendous differences between the printings anyway. Were the plates touched up - or replaced alltogether? The shading on the chin/neck on the left stamp is almost as heavy as for the Bordeaux printings - whilst the pair has clearly defined dots.
As far as I recall the colonial stamps were printed using the same plates as the matching perforated stamps of France, however at a later stage when the plates were more worn. But my memory may serve me wrong.
Another interesting feature is that the left stamp in the pair appears on my screen almost as having partially fond-ligne (lined background), most visible to the left of Ceres nose. If it is not listed in Maury it is probably not significant as a variety - I still find it peculiar.