Stephen Johnson compares the first published works of Brahms and Berg, both piano sonatas.
Sonata for piano No. 2 in F sharp minor, Op. 2 - 1st movement
Fantasia in C major, D760 (Wanderer Fantasy)
Ludwig van Beethoven
Sonata for piano Op. 106 (Hammerklavier) - 1st movement
Sonata for piano No. 1 in C, Op. 1 - 1st movement