The PSR2000 can play the new styles from the PSR2100, but they won't sound quite the same. All of the notes will be the same, but not the instruments. For example, for the MediumJazz style, the 2100 uses a Live!GrandPiano and a Live!JazzGuitar in the accompaniment. When read into the 2000, these voices are read as the GrandPiano and JazzGuitar (the 2000 doesn't have these two voices.) Yamaha did use some of the new voices in the new styles, but not in the older styles. In addition, the OTS will also be a bit different. For this style, A used a Cool!Jazz Organ sound for main; the 2000 replaced this with a Drawbar Organ. B used a Live!GrandPiano and a Vibraphone; the 2000 showed a GrandPiano and a Vibraphone. C used Sweet!Flute & Cool!JazzSolGT; the 2000 used Sweet!Flute and JazzGuitar. Finally, for D, both instruments showed Sweet!TenorSax and BrassCombo. But even when the same voice is called for, it doesn't sound quite the same on the 2000. I have found that replacing the instrument with the preset instrument significantly improved the sound on the 2000. That is, replace the Sweet!Flute from the 2100 style with the Sweet!Flute in the 2000. Essentially, this is replacing any modifications to the instrument sound from the 2100 with the sound as it comes directly from the 2000. The Live!GrandPiano sounds feeble on the 2000, but putting in the regular 2000 GrandPiano and the sound is fine. This was also true when converting Tyros styles for use with the 2000. The Tyros voices were improved when replaced with equivalent 2000 voices. In some cases, such as the Harmonica, which was probably meant to be the Sweet!Harmonica, the normal Harmonica was often not as good as simply putting in some other main voice. I haven't had a chance to do much extensive testing, but it is my bet that the Tyros styles when played on a 2100 will not need any voice conversions. That is, the Sweet!Flute from the Tyros style will sound just fine when played on the 2100. Ditto for the Sweet!Harmonica, which IS on the 2100, but not the 2000.