Amazon's description of the 2020 set didn't show much beyond the front cover and alleged runtime – no back cover, no detailed list of bonus material, not even a listing of the 20 'core' cartoons. Warner Brother's site has a press release for the 2010 set, but not the 2020 one.
Without more...
Maybe you didn't scroll the search results, or pay attention to the color schemes. I specifically noted that the covers used the same name, and did not include "70th" or "80th". The color change is the main thing that stands out.
Both covers say that there are 20 classics on 2 discs, but...
On Amazon, there are two Essential Bugs Bunny DVD titles, both of which have 20 cartoons on two discs. The covers look extremely similar except for some reversals of red and black in the color scheme. Both include the word "Anniversary"; neither include helpful information like (70th...
Leonard Maltin presents 11 "rare" cartoons on a MGM/UA VHS tape called "WARTIME CARTOONS". Some of them might contain offensive content. The tape does not include the one you name (whose title clearly contains offensive language), but then, the jacket does not make the claim that the set of...