Interesting stuff guys. But I hope you guys are aware of what this thread is actually for. It's not really to compare your overall GCSEs to your A-Levels, it's supposed to compare individual subjects you've taken for both GCSEs and A-Levels, to show that you can do better in A-Levels than GCSEs.
Example of what I mean (note that this is made up):
Subject: English Literature
GCSE Grade: C
A-Level Grade: A
Comments: I didn't do that well in English Literature for GCSEs, but I made sure to make a significant improvement at A-Levels.