Excellent comparison and good to solve the mystery on whether it was just a wonky print run or a 'proper' variant. Thank you for sharing.
The blue was one of the first Star Wars posters I bought, many years ago. I remember it clearly as it was a Cinemasterpieces ebay auction and I was a bit drunk when I bid and the next morning I felt like I'd overpaid a little...but then when it arrived I loved it.