Both recorded all 32 Beethoven sonatas and 27 Mozart concertos — in Brendel's case, twice. They also covered Schubert, Schumann, Brahms, Liszt and, in Ashkenazy's case, Chopin. Ashkenazy, the Russian exile, branched into Mussorgsky, Rachmaninov, Prokofiev, Scriabin and Shostakovich. Brendel, the Austrian émigré, saw to Haydn, some Dvorak and the infinitely challenging piano concerto of Arnold Schoenberg.