Just looking at some French past papers. For the iGCSE Writing paper, candidates have to compose two essays of between 350-500 words each. For the GCSE (AQA), they have to do one essay of 90 words and another essay of 150 words.
The iGCSE is therefore requires three times as much content (with the risk of three times more grammatical mistakes).
However, both exams are weighted equally.
How can this be?