I noticed that too. Would be nice if they let us know what the revisions were.....like putting them in red. It's good to know that they are constantly updating. This is my first Honda and I am developing a lot of respect for HONDA. Makes me think I made a wise purchase over the competitors.
I agree that it seems weird that the 2073 and 2710 manuals seem out of sequence. But that's what I see.
I don't have the full version of Adobe Acrobat to compare them, but I saved them as text and used Word to compare them. Differences are very minor and many are not substantive. In one change, they changed the color of an indicator they were referring to. That kind of stuff.
They also have the separate Navi manual and the Owner's Guide (it didn't used to be there at all):