Just a modification of some palettes in this version, notably the Tetriminos color combos for each level. Three different level types, x1, x4, and x5, feature palettes from the out-of-bounds section when going through all 335 levels. The castle and some other colors in the endings were also touched up.
Database match: Tetris (USA)
Database: No-Intro: Nintendo Entertainment System (v. 20180803-121122)
File SHA-1: 77747840541BFC62A28A5957692A98C550BD6B2B
File CRC32: 6D72C53A
ROM SHA-1: FD9079CB5E8479EB06D93C2AE5175BFCE871746A
ROM CRC32: 1394F57E