I am very wary of assigning manufacturer's by 'style' alone.
There is nothing in the Italian article to identify the type other that it being an artists impression of a concept illustrated in 'Aeronautics'. Also, we can't be sure the Italian magazine hasn't redrawn it, so we can't judge the accuracy.
It's worth noting this design is actually smaller than the Folland Midge and Gnat.
Aeronautics was a British monthly journal edited by Major Oliver Stewart, M.C., A.F.C. which ceased publication in March 1962 and was founded by Stewart in 1939.
Stewart had been a ferry pilot and fighter pilot during the First World War and subsequently served as a test pilot at Orfordness and Martlesham Heath and became commandant of the Aeroplane and Armament Experimental Establishment. After leaving the RAF he was the aeronautical correspondents of ‘The Morning Post’ (1926–37), ‘The Times’ (1939), ‘The Evening Standard’ (1940) and ‘The Manchester Guardian’ (1941–58). Stewart had published analyses of fighters for his own magazine and others (including American and Canadian publications like 'Flying') as far back as the war. It would seem highly likely that this design was one of Stewart's creations to illustrate his analysis of the lightweight fighter, as inspired by Petter's work and others around that period. The Ali Nuove article seems to be a similar theme, an international overview of the light fighter concept.
