No, it is the exact opposite of a preferential choice. With systemic consensus, you don't go for what you consider your favourite from several possibilities. You determine your resistance to every statement available for election. The proposal that expresses the least resistance in a number of all voters wins the election.
If Hans is the person from a class representative election to whom the whole class has the least resistance, then Hans wins the election. Which can actually be quite different from voting for only one of the favoured candidates.