The overview says that multiple submissions can be submitted. Would it be acceptable to submit one with images and one just text (hard mode) of the same ship?
Good question!
Two different submissions with the same ship? That’s technically against rule 2 (“no pre-existing derelicts”), since one version would technically exist before the other. But a technicality isn’t the best reason, and luckily there is a better method.
Since it’s the same derelict (barring the optional challenges), your best option is submitting them together on the same project page. It makes it easier to manage, and easier to find/browse for interested readers.