HKCEE is public exam in HK has equal educational level compare to S'pore's O-level.
HKALE is public exam in HK has equal educational level compare to S'pore's A-level.
The mathematics exam content in both places are almost the same.
I have been teaching mathematics for students taking HKCEE and HKALE for 4 years.
Student A: taking HKCEE Math -> result B
Student A: taking HKCEE Add. Math -> result B
Student B: taking HKCEE Math -> result A
Student C: taking HKALE Pure Math -> result B
Student D: taking pre-univ level Math course -> result A+