In Russia and Ukraine, a button accordion is known as a Bayan. It is capable of playing anything that the regular accordion can play but the problem comes with altered chords used in jazz. Diminished chords are hard to play, they have to use added notes in the right hand.

Actually, the Bayan has a richer and more delicate but better defined tone than the piano accordion. You can YouTube some Russian and Ukrainian Bayan music to hear the difference.