I don't think they're similar enough to warrant the uproar. Sure, they'd clash against each other, but so do many jumpers. They have the same colours, but so do many jumpers. If it's about people seeing a team in a black and white jumper and thinking they're Collingwood, one look at the score graphic where it says Port Adelaide will correct that. Collingwood changing their jumper in the early 2000 has made the clash much worse, I think Port's white on black could be a good match up against Collingwood's black on white. Anyway, Port's jumper is better.