At Wembley we need to pick a team to win the game. Both King and Atkins are good players and I wouldn't be worried about either.
Catalans' left edge, with Wiliame, Edwards and Yaha, is devastating and is a big part of their success. So the question must be: what is the best selection to nullify that threat, and do we have enough of a threat of our own to put Catalans under pressure down that side?
At this stage I think that a fit Atkins might just be the better option. He is an aggressive runner and defender and can take petrol out of the tank of people like Wiliame and Edwards. Edwards is also a bit of a bully/nice person, and I think Ryan has the temperament not to get wound up by him. If Atkins can drag Yaha into a tackle with the odd big charge, you can see there being the room outside for Charnley to make an impact.