All just my personal opinion
Oxana Shevchenko in a private piano recital, 2016-01-16 — Chopin: “Polonaise-Fantaisie” in A♭ major, op.61; Ravel: La valse; Medtner, “Sonata-Idyl” in G major, op.56; Rachmaninoff, Paraphrases after Mendelssohn and Tchaikovsky; Stravinsky: Trois mouvements de Pétrouchka
Piano recital by Stephen Kovacevich in Baden / Switzerland, 2015-09-18, featuring Alban Berg’s Piano Sonata in B minor, op.1, and Franz Schubert’s last two Piano Sonatas, the Sonata in A major (D.959), and the Sonata in B♭ major (D.960)
… while for the past two decades the artist is mostly pictured with an earnest, maybe “Beehovenian” / titanic, somewhat closed facial expression, in the concert (which he presented with a mostly relaxed, yet controlled body language) his face hinted at a wealth of emotions — and his playing struck me as a prime example of the “big Russian Piano School” …