Couldn't tell them apart

They looked so alike I couldn't tell them apart except when James was wearing his rosary and even then trying to read subtitles and figuring out who was who was still very difficult.
I almost thought they were the same actor and the director was using them kind of the way the director used Lohan in Parent Trap.. just really good editing.
But they are not the same actor.

when you had close ups on their faces they were very, very much alike.. almost down to their jawlines.
Jess from a distance looks fairer with lighter hair and features. But actually up close he has the same darker features as James. James has a slightly more athletic body but again.. they do so much rolling around it was very hard to tell them apart when scenes would cut a lot.