Thesecond yes, CIE produce different papers for the different time zones (there are 3 I think)
dogzdinner IGCSEs are produced for the international market (but including U.K.) A lot of private schools moved to them as the old GCSEs became increasingly modular and arguably open to abuse. They used to be seen as being more rigorous and I think by and large they were, and were judged to be a better preparation for A Level. Now that GCSEs have been reformed I think a lot will move back to them, but many have stayed with igcse for this year at least to avoid the teething troubles that often accompany new exams.
I'd be amazed if any of the boards have a boundary of 68% for a 9.