I don't know about the story behind those two VFT's, but I do know that growing Dionaea side by side doesn't really show if they are the same clone or not.
I have some divisions of the same clones of VTF's and they don't show the same shapes and colors, I have a couple of south west giant plants and they are all divisions from one plant, they grow with a lot differences from each other, coloration, upright traps, teeth etc. are all showing differences to me, while it's still the same clone and grown under the exact same conditions.
I also have the same issue with some other named Dionaea clones and typical plants from the same mother plant. I don't really know how to explain that, but it just seems to be.
Good luck!