I got 4As 2Bs 1D and 1F at GCSE (1 B,D and F were compulsory at our school so I HAD to endure them)I haven't done A2 yet but for AS I got:BCC where Cs were about 20 UMS away from from a B grade.
I have friends who've done better than me at GCSE who got a bit worse grades than me in AS and some others who got equal or slighly less/more than me in GCSE and quite better than me in AS(One who got AAC)