For anyone struggling with this too, this is what I've ended up doing. Show coding stripes for the nodes you want to compare and also select 'users'. If you've got a lot of coding, make the coding stripes pane bigger by dragging the border to the left. Coding stripes are shown in a more intense colour when both coders agree. Once you know this, you don't need to hover over each stripe to see whether who has coded it. Pale colours indicate that a node has been coded by just one of the coders. I've then coded the ones we disagree on as 'Discuss' which allows me to find them easily when we have the consensus discussions.