im a igcse student.....well i have to say syllabus wise i think spm learn more than igcse. Example in biology spm learn about mitochondria and stuff but in igcse we learn thebasic such as cell wall and stuff.....But i have to say spm have a low passing grade...i heard that 70% is an A in spm..if passing marak was this low i would have got straight As in igcse ....but igcse have standardised marking......hence 80% would be an A....this make it harder to score....plus the more sophisticated english they are using......thats all hopes it help ...cheers