In my opinion, the reason why RC knows with 100% certainty that the Georgia 997 is no widebody is because he knows that the upcoming C4 and C4S are not going to be widebodies and the only widebody in the 997 lineup will be the Turbo and since that 997 in Georgia is no Turbo it cannot be a widebody.

And that would explain why we haven't seen any C4S spy shots even though it's so close to its release date. (according to RC's schedule)