Quite simply, one of them has looked like an international batter and one has not. In particular, Bethell has thrived against high paceIt's tricky giving Pope the gloves at 3, yeah. I think he could do it but there's already enough pressure on him with the bat. As it's short term it wouldn't hurt because everyone knows Smith would be coming back in. I still think they'll go with Cox but they must be looking at the way both of them have played this past two weeks and be tempted to pick Bethell.
Also with the benefit of hindsight, Phil Salt might have been the ideal replacement opener when Crawley was crocked