All just my personal opinion
Richard Strauss, Violin Sonata in E♭ major, op.18 in three interpretations: Haifetz / Sándor (1934); Spivakov / Bezrodnyi (2001); Frang/Lifits (2010) — and memories only (sadly) of an LP recording with Ulf Hoelscher and Michel Béroff (1978)
Mendelssohn: Piano Trio No.1, op.49 — comparing recordings with the following artists: Rubinstein/Haifetz/Piatigorsky (1950) / Trio Wanderer (2006) / Voces Intimae (2012)
A “statistical overview” over the recordings on the 142 CDs included with the box set “Arthur Rubinstein, The Complete Album Collection”