These two piano fantasies were written at different stages of the composer's life.
Piano Fantasy No. 1 was written while the composer was in Junior high and had been composing for a year already. It was started when he was 14 and finished in about 6 months.
Piano Fantasy No. 2 was written about 6 years later in the composer's Sophomore year, and uses the classical period and such composers as Mozart and Haydn as his inspiration.