I quote from Håkan Gustavsson and Ludovico Slongo, "Desert Prelude", vol. 2, "Operation Compass", Stratus – Mushroom, Sandomierz, 2010
"Italian fighters... while able to retain numerical superiority, were also able to shoot down a good number of Hawkers without suffering crippling losses in the air. On the contrary, from the analytical analysis of the dogfights of 1940 over North Africa it appears that the Hurricane was even less effective than the Gladiator in the air superiority role against the Italian biplanes" (page 171).
"Hurricanes were fighting, although in small numbers, from the beginning of Mediterranean war and the studies of Brian Cull and Christopher Shores permit us to fully appreciate the impact of their presence. From this research it emerges that, up to the start of "Compass", in fighter versus fighter combat the Hawkers in the Mediterranean were unable to show any real superiority over the CR.42s. Surely, it was not strictly the case, but from a purely numerical point of view it actually seems that up to December 1940, the Fiat biplanes demonstrated a slight superiority over the Hurricane in dogfight (7 Fiat shot down for the loss of 9 Hurricanes in the whole Mediterranean, North African, East African areas)" (pages 176-177).