All just my personal opinion
Concert review, Chiaroscuro Quartet @ Church St.Peter, Zurich, 2018-05-27 — Bach: The Art of Fugue, BWV 1080; Beethoven: String Quartet No.2 in G major, op.18/2; Mendelssohn: String Quartet No.1 in E♭ major, op.12
Concert review, Quatuor Van Kuijk @ LAC / Teatrostudio, Lugano, 2018-04-22 — Debussy: String Quartet in G minor, op.10, L.91; Webern: Five Movements for string quartet, op.5; Mendelssohn Bartholdy: String Quartet No.4 in E minor, op.44/2
Concert review, Hagen Quartett @ Stein am Rhein, 2017-10-01 — J.S. Bach: “The Art of the Fugue”, BWV 1080 (Contrapunctus I, II, III,IV); D. Shostakovich: String Quartet No.15 in E♭minor, op.144; F. Schubert: String Quartet No.14 in D minor, D.810, “Death and the Maiden”
Concert review, Signum Quartett @ St.Peter Church, Zurich, 2017-10-08 — Haydn: String Quartet in D major, op.20/4; Beethoven: String Quartet No.15 in A minor, op.132