Except that they didn’t take extra care with Huygens. Read the quoted excerpts from my post again. The Huygens probe was NOT sterilized.
That’s why there was “[n]o mention of extra sterilization procedures done on Huygens” in the Nova episode – because there apparently weren’t any. (Of course, they could have discussed why this decision was made instead of glossing over the issue.)
Since they also state that the entire Cassini-Huygens mission was determined to be “Category II” mission, I take that to mean that the Cassini orbiter was not sterilized either.