More of the same. We have Haldeman’s notes of his meeting with Nixon, and we have forensic proof that we aren’t missing any of his notes for the day. Nixon was clearly starting to talk about coverup, but would not yet have elaborated the whole CIA National Security lie.
Nixon didn’t wipe the tape because it was more incriminating than the Smoking Gun tape. He wiped it because it was the first tape he got hold of, and he was defeated by the challenge of wiping them, as a long-standing klutz.