Much better in the second case, even if the two biggest winners are the same, but 1) they have less power and 2) it gives the others a chance to keep growing at

Much better in the second case, even if the two biggest winners are the same, but 1) they have less power and 2) it gives the others a chance to keep growing at the next election and replace the 2 biggest ones in 1 or 2 terms. And 3) the power is more distributed among 5 or 6 bigger parties - much better than just having only 2 or 3 parties. That said, approval voting would've worked even better: http://www.electology.org/#!approval-voting/cc04 http://www.electology.org/#!approval-voting/cc04