I think it the primary thing would be the equalisation of the time line, in which the RAF has a huge benefit currently.
The present most modern luftwaffe fighter with these armorless cocpit, DB 601 engine and MG-FF weapon enters service in early 1939, in
Spanish Civil War*
The first Spitfire Mk II enters in service in Aug 1940. The Germans got the 109 E-7 in the
same month. An Bf 109 E-4, DB 601/N engine and a MG-FF/M cannon were received already on the same summer. From E-4 the German airplanes were equipped with Armoured cocpit, automatic prop pitch and automatic water radiator system (i mention the most important ones only).
So, the Hispano may wait for a short time...
*"Early in the year (1939) J/88 had recieved 40 new cannon-armed Bf 109 E fighters, and the outdated early marks were passed to Gruppo 5-G-5. On 5 March Mölders's replacement as leader of 3 Staffel." (Osprey Airwar3 - Christopher Shores: Spanish Civil War Air Forces, page 42)