In Babylon 5 we are told that a Vorlon can control their appearance in regards to certain modified races, generally making themselves appear as angelic or otherwise religiously significant beings via some manner of telepathy. In the episode Falling Toward Apotheosis, however, two Vorlons fight outside of their encounter suits, bearing a energy/jelly-like appearance, similar to Lorien's natural appearance.
Due to this similarity with another First One, one would assume that this is their physical appearance, sand projection -- but being as they are of the same species, however, there should not be such a huge difference in appearance between the two Vorlons.
Can Vorlons change their physical appearance, as well as projecting a different appearance, or is there anything from JMS that might suggest that these very different energy squid appearances are also projections?