The photos aren't good enough to make a proper comparison of transfers. However, there do appear to be some substantial differences. The upper photo shows a curved-edge transfer (note the cropping of the sea) specifically designed to sit in the centre of a dinner plate. The transfer on the plaque (see previous post) is squarer in design. The side of the ship on the three plates is reflective and light, whereas on the plaques it is hatched and dark.
So there are at least two possibilities. Firstly, the transfers could have come from separate copper transfer plates. That wouldn't particularly help our argument (though wouldn't upset it either). Secondly, a single copper transfer plate could have been re-engraved to restore detail lost over time. The engraver could have added bits of sea to square the design off, and make it fit better on a plaque. As an engraver can only add extra lines, not take them away, this would suggest the plates pre-date the plaques.
I'm reserving judgement until I see a better photo!