The Lippincott design uses a much bolder blue in the familiar shield/wordmark combo, but now a custom-typefaces has been added and the letters are larger: legibility at all sizes in all applications had been a challenge with the previous design. Herb Lubalin’s “everyman” profile has been softened, and the faces have been subtly reworked so they are looking in a more upward direction (although this is difficult to discern). The design has been flattened and its highlight removed, again a nod toward better legibility in all applications.
You can view the brand guidelines at https://www.pbs.org/brand/