We could discuss whether insincere equal ranking for top is more dishonest or whether approving one more candidate is more dishonest...
Ah, ok, I should have read the second before responding to the first. You're a step ahead of me. ;)
As I said, the two approaches are very hard to compare. In some sense, insincere equal rankings is a dishonest RELATIVE opinion, while insincere approval is a dishonest ABSOLUTE opinion. If you vote on a rated ballot which has an implicit approval cutoff, then the two are more directly comparable. Then again, some voters will place more psychological stock in absolute position on a rated ballot than others will.
I think we both agree that they are less extreme than reversing rankings of two candidates. This is trivially obvious when comparing to dishonest equal-ranking.
In the end this is an interesting psychological question, but a hard one to come up with any solid conclusions about.
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