New data, from the "Ryloth Trilogy" of the Clone Wars series. The camo scouts who found the Huttling on Teth in the CW movie last summer reappeared in white and have been seen on foot and driving the AT-RTs. They are called... *musters self-control* ...ARF Troopers. I am not kidding. Advanced Recon Force. BARC to ARF. I love it. *sigh* Anyway. That's the Phase I armour. By the time of ROTS, it had evolved in two different directions for Phase II. One kept/refined the original look for the Phase II AT-RT drivers. The other lightened the armour for the Kashyyyk Troopers/Jungle Troopers/Swamp Troopers/whatever. I move that these are the Phase II ARF Troopers. Pending more data.
As for the whole BARC thing... Neyo and his riders of the 91st Recon Corps wear the same armour as Fordo in the second (orignal) Clone Wars cartoon. Fordo's an ARC Trooper. Makes sense to me that what Neyo is wearing is the Phase II ARC armour, as we have a lot of other examples of Episode III Clone Commanders modifying their kit with ARC trappings, as a nod to the Troopers to trained them. And since he's riding a speeder bike, what BARC stands for fits exactly: Biker Advanced Recon Commando. And further, it's called a BARC Speeder because it's the speeder for BARCs -- describing who the speeder is for, not what kind it is, if that makes sense.
I reject calling this the 41st Elite, as we saw the 41st Elite on Coruscant in regular Phase II armour (with grey markings) prior to leaving for Kashyyyk. I reject calling it the Kashyyyk Trooper (except in the broadest terms), as I refuse to believe that it was designed for and used on only one planet in the war*. I reject also Swamp Trooper, as there was no swamp -- jut a beach at the edge of a jungle-y forest, and jungle =/= swamp. With the Phase I ARF Trooper's appearances as an example, we don't even know if they're always in camouflage. Yes, that's what we saw in the movie, but we should be prepared for anything as Phase II armour starts appearing in The Clone Wars animated series.
--Jonah
*Anyone remember Leia referring to the Clone Wars, plural...? So how come what we're seeing called the Clone Wars seems more like one big war, singular?