Excellent observation! You must imagine me with a monocle now. Indeed, the composer of the work in question was, in his youth, known as a very avid lover of the classical style (and his "hatred" of Wagner, which must have been a result of Wagner's involuntary influence on his music). The piece is from an early opus number. He composed all of the pieces in the work apparently, at the time, under the influence of Johannes Brahms's classical style; the influence is evident, particularly in this piece.
No. 3 is by a Russian composer. One that developed a very minimal quartet-like style in his late sonatas, much akin to the quartet-like writing of the Op. 126 Bagatelles by Beethoven.
EDIT
Excuse my mistake, but I confused the order of the sheet music. The first paragraph is about No. 4. Hah.