I've just done a dummy booking on the airline website and it's come back with:
Wed 2 Mar, '05 London (LHR)
09:00 PM KLIA (KUL)
07:10 PM MH 7
First
One Stop
Tue 15 Mar, '05 KLIA (KUL)
09:40 AM London (LHR)
03:15 PM MH 8
First
Non-Stop
Option 1 : First (A)
View Fare Breakdown Total ^GBP7,412.80
Fare Rules Rule1
Option 2 : First (F)
View Fare Breakdown Total ^GBP8,072.80
Fare Rules Rule1
which suggests again the A is in this instance very marginally discounted First