User blog comment:Master Sima Yi/Assassinews 19-03-'14 – Two Assassin's Creeds for 2014?: Unity and Comet/@comment-5174994-20140612183407/@comment-3046679-20140612183835

The outfit pieces seem to have stats, as opposed to being purely cosmetic. But I also hope there won't be some ultimate outfit pieces for co-op, save those for single player.