I believe the list is based on SPM results alone.
Whereas MRSM excel in not only in the SPM, but also in the variety of programs that it offers, which some include:
1) program bitara
2) program ulul albab
3) program igcse
4) program teknikal
5) program premier

IGCSE is probably the newer one where students will have to take the
Cambridge IGCSE exam at the end of form 4, as well as SPM at the end of form 5. Basically, once you finish school, mrsm students will possess two certifications.