According to Hasbro's description on the box of the
ROTS BARC Speeder w/BARC Trooper, 'BARC' stands for
Biker
Advanced
Recon
Commando. That name makes the BARC Trooper sound like an ARC Trooper on a bike, or basically an 'elite' class of clones that specialize in speeder bike patrol/reconaissance.

So why did these biker commandos seem to make up the entire basic fighting force of 'grunts' on Kashyyyk in the movie? I didn't see any other clone trooper armor designs in the battle there, except of course Commander Gree.
In a basic figure release a year later, Hasbro called it an 'Elite Corps' clone trooper. But if these clones are so elite, why did they pour a ton of them onto that beach? I would think that with the Republic spread thin across the Outer Rim, they would want to use their 'elite' forces a little more sparingly. And also, what happened to the bike thing? Weren't they '
Biker Advanced
Recon
Commandos' before?
Then they called the more recent figure a 'Kashyyyk Trooper,' from 'Sarlacc Battallions A and B.' That makes the guy pictured above sound more like just a basic grunt. But on the same packaging it says these clones are part of the '41st
Elite Legion.' So just what does it mean to be 'elite,' and what happened to the BARC thing? Maybe BARC troopers are just an elite class within an elite class within 'Battallions A and B?' But wait...the 41st is an elite 'legion,' and isn't a legion bigger than a 'battallion?' My knowledge of names of soldier groups isn't too good, so maybe someone can explain that.
Oh, and let's not forget this guy...

It looks like the pic isn't working; this is the clone that came with Tsui Choi in the Order 66 pack. They're calling him a BARC Trooper. A
Biker Advanced
Recon
Commando. Huh!?!
And I'm not even gonna attempt to go into the role of Imperial-era Biker Scouts and how they may be relevant to the BARC issue, I'll let someone else tackle that one. I'm already confused enough.
So, let's try to clear all this up. Your thoughts?...