Clarr is indeed correct. They are 2 different ships in canon. Generally speaking, we (the art team) tend to take artist liberties with entities in canon that lack a visual depiction when we create the images. If the entity type gets an official design, there's a chance that we might remake it, but honestly we'd rather redo ships that we don't have our own official images for yet over redoing ships we've already created images for.
It may be worth noting that the two 'different' ships are two sides of the same coin on Wookieepedia. That is, one is the 'canon' link and one is the 'legends' link, which usually indicates they are meant to represent the same or similar entity.