I would keep hope until one was actually examined in person (or by proxy - which indeed was the genesis of the thread). When you have a photograph displayed on a computer screen in a room with lighting there are many opportunities for colors to appear different that the resulting judgement will almost always be off in some way. Even holding the object in room lighting is going to give different impressions depending upon the lighting. But in that case the Mark I eyeball combined with advanced organic signal processing can usually come to some correct conclusions based upon observing other objects and colors in the same light.
That said, I find it difficult to imagine that the "natural" as pictured from Sweetwater was intended for a product line that already included the cherry red. I winder if there was an error in production and they decided they could use it anyway.
"natural" suggests to me a finish with no pigment so the dominant color is that of the underlying wood. For no particular reason I think of maple as the most common underlying wood.
Since Oxnard continues the Guild tradition of model numbers that lack consistency, perhaps, since there are so few bass models, they are continuing the tradition with finish names and offerings?