It depends. Vessel traveling by land or sea I choose Lyon. Vessel traveling by air, Achmë.

Yes, yes, I have a sense why this would be a good order to use them... Though I do not have intention to use air-vessels in the way they are employed in other more "steam-punky" works, you have given me a pause for thought... Thank you, pdarnold :)

I generally agree with pdarnold posted.
Lyon: Land or Water, bulky and massive
Achmë: Air or Water, more sleek and not quite as large.