This 1962 update has the same cover as the 1948 Yellowstone booklet, but inside is very different. The number of color photos has been more than doubled; most of the photos have been updated; and the page count has increased. Even the centerfold photos, which are of exactly the same scene, are in fact different.
Some of the text is the same, but line spacing is increased for readability. Interestingly, the map on the inside back cover has quite a bit more detail than the 1948 version, but has been reduced to one page, eliminating the extra expense of a fold-out cover.