The difference is there’s only 20 total so that makes it a distinct variant like saying the Blank Cover was offered as a 1:10000 ratio or something like that. 1:5000 ratio variants have pulled in the 2-$3000+ for DK3 and that was with maybe 56 covers on the market. I was in the $200 to $500 line of thinking also when I thought the sketch itself was an added piece of paper not part of the actual book itself. I’d also like to see what the other 14 covers looked like as well so I could form a top 10 list for the one’s I liked the look of the most in case they appear available at some time in the future.
They actually posted a full page in #2 showing a chart with the 20 secret sketch variants to show how many are found. That should get a few peoples attention that don’t read social media news.