All just my personal opinion
Concert Review, piano recital Piotr Anderszewski @ Tonhalle Zurich, 2017-05-30 — Schumann: Variations in E♭ major, WoO 24, “Ghost Variations” — Mozart: Fantasia in C minor, K.475/Piano Sonata No.14 in C minor, K.457 — Leoš Janáček: On an Overgrown Path, Book II — Chopin: Three Mazurki, op.59; Polonaise No.7 in A♭ major “Polonaise-fantaisie”, op.61
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
(…) I’m not a professional concert reviewer — but unfortunately, this event went largely unnoticed by the media, and at least in the two newspapers I checked (the Neue Zürcher Zeitung and our local newspaper) the concert was not reviewed at all, so let me try giving at least some rudimentary, subjective comments on how I experienced the evening…
(…) Yulianna at that time had just finished her concert diploma and had since become Prof. Scherbakov’s assistant (which presumably consists of filling in for him when he was away for concerts or for a recording session). This is now 3 years ago, and she has evolved as a pianist quite dramatically since then…