I suppose the next logical question would be, does this look like ANY of the helmets? Is this secretly an ESB or maybe ROTJ? Perhaps it's a scan of the Ep 3 helmet?
I think the hardest time I have about understanding the extreme attention to detail is that Lucas and his crew don't even use those same standards, with each iteration looking different. Honestly, there is NO continuity whatsoever between Episodes 3-4-5-6 in the Vader suit. Can we really expect that Vader would have his helmet shape changed every couple of years? Do the lights blink in Ep3, then stop in Ep 4, then blink again in 5 and 6?
I always thought that his gray/black paint scheme was due to filming difficulties, and the fact you couldn't make out his facial features when he was truly black so they had to cheat and paint some parts gray to stand out more. If that is the case, it would seem to me that the intention was for Vader to be completely black, and the gray only exists to accentuate the appearance of black on the film? So which is better, to go with pure black as intended or gray/black which is accurate, in case you were going to film yourself in the helmet?
Then add in the fact that everything you see on film is probably barely sturdy enough to survive a couple of shots, made of disposable materials and doesn't actually function. I mean, if Vader was real, the inside of his helmet wouldn't have foam padding, it would have readouts and life support equipment, yet the exact replica of Vader involves lots of foam padding and straps for your head?
It's things like this that have me thinking I would prefer the "essense" of Vader rather than the actual Vader. The Riddel helmet is a perfect example - it has no chin strap or foam, but rather was built to look like a Vader helmet that a Vader would wear, not an actor. When I think of authentic, I want to think "Wow, Vader came over and left his helmet" not "Wow, some actor came by and left his Vader Prop here"