As to the statues of Sneferu, do they have no cartouches ??, either they do or they don't Pete, you know that ascribing something on looks is not safe.
Believed is not quite good enough Pete, and could not of Khufus Horus name been painted there at any time after the removal of the casing stones ??
The arguement stands on it's merits, hypocrisy is rank, and as you say , a lack of evidence is indeed evidence of nothing.