Haha, thought I'd share what I did with my extra.
So I paid $135 for the lesser condition re-release and $68 for the original.
Didn't need 2 copies, so I put the re-release up on eBay for $60 hoping it'd sell sooner than later. Took 12 pics of it, front & back & close-ups of the condition in all it's flawed glory.
Described it as:
"From a 1963/1964 re-release (Cape Fear originally came out in 1962), as Cinemato (8th picture) did not print after 1964.
Poster has a reasonable amount of wear, I've tried to convey it's condition with the pictures but if you want any additional photos let me know."
and of course the guy who sold it to me for $135 buys it lol. Auction ends Sunday, I ship Monday, delivered Wednesday ("Great Poster! Fast Shipping! A+"). And it's re-listed at $165 with his original description. At least now he's included a photo of the back of the poster.