It is the Kirill Gerstein version of the concerto. Here is some info:
Since 1894, Tchaikovsky's Piano Concerto No. 1 has been published and performed in a version containing numerous unauthorized editorial alterations that were added posthumously. This is the first recording using the new scholarly edition by the Tchaikovsky Archive and Museum in Moscow of the 1879 version of the Piano Concerto - the version that was approved and conducted by Tchaikovsky until his last public appearance in 1893.
Review
"Perhaps the most striking aspect of Gerstein's interpretation is his ability to make the piano writing sound much lighter and more transparent than usual. Indeed, in several passages throughout the first two movements, dialogue between piano and woodwind achieves a kind of Mozartian elegance. Instead of the conventional barnstorming bravura, Gerstein brings poetry, balletic grace and an infinitely wide range of timbres. Yet in no sense does the performance seem understated."
--BBC Music Magazine 'Concerto Choice', five stars, February 2015
Tchaikovsky & Prokofiev: Piano Concertos Hybrid SACD - DSD
Kirill Gerstein (Artist), Pyotr Ilyich Tchaikovsky (Composer), Sergei Sergeyevich Prokofiev (Composer), Format: Audio CD
https://www.amazon.com/gp/product/B00S6EN28Y/ref=ox_sc_act_image_3?ie=UTF8&psc=1&smid=ATVPDKIKX0DER