A-levels has the same "difficulty" as STPM.
The only thing that makes A levels a little easier is your exam is split into 2.
Known as AS2(mid term), and A2(end of yr) correct me if i'm wrong.
but STPM all cramped in the final part...
and A-levels are cambridge based.(UK)
so your general paper is in english,STPM pengetahuan am paper is in BM.
juz my 2 centz