Interesting… contrasting the two in one…. Have read much Twain including both the travel books you describe, with his sometimes hilarious observations… And all of the autobiographies as well, recited to a scribe while “lingering”…
Over the course of a lifetime I’ve found his pithy quotes useful on many occasions, and shared a few on this Medium post.
I don’t know if you read audio books, but my favorite “reader” (narrator) of audio books is Grover Gardner and his reading of Twain’s autobiography is exceptionally good.
Anyway, all that was triggered in an instant when I read your piece. thanks