Question: Who was a prolific and influential composer of the Classical era; Pietro Mascagni or Wolfgang Amadeus Mozart?

Context paragraphs:
List of Classical-era composers: This is a list of composers of the Classical music era, roughly from 1730 to 1820.  Prominent composers of the Classical era include Carl Philipp Emanuel Bach, Johann Stamitz, Joseph Haydn, Johann Christian Bach, Antonio Salieri, Muzio Clementi, Wolfgang Amadeus Mozart and Luigi Boccherini.  Prominent composers of both the Classical and early Romantic eras include Ludwig van Beethoven and Franz Schubert.

Pietro Antonio Lorenzoni: Pietro Antonio Lorenzoni (1721–1782) was an Italian painter who is believed to have painted several portraits of Wolfgang Amadeus Mozart and his family: "The Boy Mozart" (1763), his sister Maria Anna Mozart in "Nannerl as a Child" (1763) and a portrait of their father Leopold Mozart (c. 1765).  He arrived in Salzburg, Austria in the 1740s and first wanted to paint Wolfgang and Nannerl.  His protégé, Johann Nepomuk della Croce, painted a Mozart family portrait in 1780.

Franz Xaver Wolfgang Mozart: Franz Xaver Wolfgang Mozart (26 July 1791 – 29 July 1844), also known as Wolfgang Amadeus Mozart, Jr., was the youngest child of six born to Wolfgang Amadeus Mozart and his wife Constanze.  He was the younger of his parents' two surviving children.  He was a composer, pianist, conductor, and teacher from the late classical period whose musical style was of an early Romanticism, heavily influenced by his father's mature style.

Josepha Weber: (Maria) Josepha Weber (later Josepha Hofer, Josepha Meier; 1758 – December 29, 1819) was a German soprano of the classical era.  She was a sister-in-law of Wolfgang Amadeus Mozart, and the first to perform the role of The Queen of the Night in Mozart's opera "The Magic Flute" (1791).

Wolfgang Amadeus Mozart: Wolfgang Amadeus Mozart ( ; ; ] ; 27 January 1756 – 5 December 1791), baptised as Johannes Chrysostomus Wolfgangus Theophilus Mozart, was a prolific and influential composer of the Classical era.

Amadeus (film): Amadeus is a 1984 American period drama film directed by Miloš Forman, adapted by Peter Shaffer from his stage play "Amadeus".  The story, set in Vienna, Austria, during the latter half of the 18th century, is a fictionalized biography of Wolfgang Amadeus Mozart.  Mozart's music is heard extensively in the soundtrack of the movie.  The film follows Italian composer Antonio Salieri at the court of Emperor Joseph II, and his jealous vendetta against his younger rival, Wolfgang Amadeus Mozart.

Pietro Mascagni: Pietro Antonio Stefano Mascagni (] ; 7 December 1863 – 2 August 1945) was an Italian composer most noted for his operas. His 1890 masterpiece "Cavalleria Rusticana" caused one of the greatest sensations in opera history and single-handedly ushered in the "Verismo" movement in Italian dramatic music.  While it was often held that Mascagni, like Leoncavallo, was a "one-opera man" who could never repeat his first success, "L'amico Fritz" and "Iris" have remained in the repertoire in Europe (especially Italy) since their premieres.  Mascagni said that at one point, "Iris" was performed in Italy more often than "Cavalleria" (cf. Stivender).

Köchel catalogue: "This is a mostly complete list of the works of Wolfgang Amadeus Mozart, according to the sixth edition of the Köchel catalogue.  For a selective list of his works, grouped by genre, see List of compositions by Wolfgang Amadeus Mozart".

Neue Mozart-Ausgabe: The Neue Mozart-Ausgabe (abbreviated as "NMA"; in English, "New Mozart Edition") is the second complete works edition of the music of Wolfgang Amadeus Mozart.  A longer and more formal title for the edition is "Wolfgang Amadeus Mozart.  Neue Ausgabe sämtlicher Werke."

Alte Mozart-Ausgabe: The Alte Mozart-Ausgabe is the name by which the first complete edition of the music of Wolfgang Amadeus Mozart, is known nowadays, published by Breitkopf & Härtel from January 1877 to December 1883, with supplements published until 1910.  The name "Alte Mozart-Ausgabe" (abbreviated "AMA") is actually a modern invention to distinguish the edition from the second Mozart complete works edition, the "Neue Mozart-Ausgabe"; the publication title of Breitkopf & Härtel's edition was "Wolfgang Amadeus Mozarts Werke.  Kritisch durchgesehene Gesammtausgabe."  (It is therefore sometimes referred to as the ""Mozart Gesammtausgabe"".)

Supporting paragraphs: Pietro Mascagni Wolfgang Amadeus Mozart
Answer: Wolfgang Amadeus Mozart