Basically with cafs if you're mark is kinda average you'll be dragged down with scaling. if you do something astronomical or just plain fantastic they will scale your mark differently as they recognise that you're not the type of student (academically speaking) that usually takes the cafs course......Still as its not technically a smart-arse course no matter what you get it won't be worth as much as say, physics
Wish i'd known about this business before i got locked into my subjects....such is life, and who else votes that they want to kill their careers adviser?!