I wouldn't hold that much stock in CGC census vs surviving copies. The first ten Showcases would all be considered scarce overall, keys like 4, 6, 8, 9 have higher submission levels primarily on the higher value and more collector interest, the #6, #8, #9 are often sold raw in fair to vg due to its easy to grade and lower value. Showcase 4 will have significantly higher submissions in low grade compared to the other Showcases and Our Army at War #83. Census numbers are going to be artificially high with any higher value Silver and Bronze book due to resubmitting the same copy and not turning in labels. Every year from 1954 which is JO #1 to 1959 overall will get a little easier to find surviving copies for any DC long running title. Sugar and Spike #1 I've found to be less on the market compared to the Superhero, although there are only 5 CGC recorded sales over $1,000.00 regardless of condition in 22 years. I've owned three copies and still have one in my collection.