Student or Learner
Does which refer to science or religion?
The science-religion debate has been going on since science was born, centuries ago. Until relatively recently, it seemed to have quietened down, but now Hawking and others have brought it back into the limelight. It's striking that the scientists who contribute most vociferously to the arguments work in the field of evolutionary biology and fundamental physics. These, at least superficially, appear to be the territories where science and religion can make conflicting claims, leading us to ask which has the better case. But are they alternatives? Is there really any serious argument between the two?
Has Stephen Hawking ended the God debate? - Telegraph
As an NES, but not a teacher, would it be clearer if you read it as " ......leading us to ask which [of the two] has the better case."?