apr records released a series of recordings entitled The Russian Piano Tradition. Lot’s of Soviet Era recordings in this catalogue. I used to believe the Russian school to be mostly psychological but right after the Orange Revolution, I visited a friend in Odessa, Ukraine. We went to the Philharmonia Concert Hall and I saw a Juilliard schooled pianist who also studied under the Soviet system. After seeing and hearing that, I had a new appreciation for Russian musical training.
Anyway, the apr recordings are out of print but they are scattered about on the internet. I have a couple originally recorded in the early to mid 1950’s and the remastering is excellent.