The Compton and Highland Sixth Form

Hi
My daughter has to chose between The Compton in Finchley and Highland in Winchmore sixth form. Does anyone know how good the teaching is at sixth form at these two schools? There are no A level results available for The Compton as I think they had their first A level exams this year and I prefer recommendations as exam results are not everything.
We need to take a decision quickly so any feed back is really appreciated.
Many thanks