If Nixon settled for a formal censure in Watergate:

[LBJ Revivalist]

With the news of the Smoking Gun tape about to be made public, on August 1st 1974, Al Haig told Vice President Ford he should prepare to assume the presidency shortly, and also informed him of six options that were on the table:

1) Nixon could step aside temporarily under the 25th Amendment,
2) He could just wait and delay the ongoing impeachment process
3) He could try to settle for a formal censure.
4) Nixon could pardon himself and resign.
5) He could pardon the aides involved and then resign.
4) Nixon could agree to leave in return for an agreement that the new President Ford would pardon him.

What would've ensued had Nixon decided to take options 1, 2 or 3?

[Bo]

Nixon would have still gotten impeached and removed from office in any of those scenarios where he did not resign. He was guilty and there was evidence to prove it.

[The Mikado]

Nixon would've been impeached anyway.

[J. J.]

With the news of the Smoking Gun tape about to be made public, on August 1st 1974, Al Haig told Vice President Ford he should prepare to assume the presidency shortly, and also informed him of six options that were on the table:

1) Nixon could step aside temporarily under the 25th Amendment,
2) He could just wait and delay the ongoing impeachment process
3) He could try to settle for a formal censure.
4) Nixon could pardon himself and resign.
5) He could pardon the aides involved and then resign.
4) Nixon could agree to leave in return for an agreement that the new President Ford would pardon him.

What would've ensued had Nixon decided to take options 1, 2 or 3?

I did an alternate history of it:  https://uselectionatlas.org/FORUM/index.php?topic=31287.0