does CIE create a different paper for each time zone sitting the exam?
Yes, they have three time zones. Apparently it's a relatively new thing because students used to do just as one would expect and gave their friends in different time zones a 'heads up' on exam content (not sure if there is any data on how much better ME kids might have done compared to SE Asian counterparts in that situation, but it can't happen now!)
It is also the reason that the few non-IGCSE subjects are so late in our day - they are held at EXACTLY the same time slot as the UK.