No suit is 100% accurate.. not even Dawn or Sams
.... especially if you ask the legion the Celebration mannequin was apparently missing to many details compared to whats in the movie... and there is some politics thrown around and the legion will not approve any Kylo Ren for a while because of that, possibly not even til after the premiere. its a bs reason, but what can you do... there are some theories floating around and me personally think a few of them are spot on :P
The fabric is the same as JJ's fabric but not "spun" the same way, but its doublethreaded and coated.
The helmet is from the concept art and minor details from the Celebration bucket. After the BS helmet got shown off, some more "theoretical" details have been spotted. But we wont know til after december 16.
But with the current CRL its more than approvable.
The helmet is getting an upgrade later...maybe, im waiting for the 3.0 from another vendor
The months after the premiere when "behind the scenes" are released and someone (hopefully) gets unrestricted access to the original, then we can start shooting for 100% accurate.