This will help you create more intricate pieces that sound great on the accordion. What is the Difference Between Button and Piano Accordions?Button and Piano accordions are two common types of accordion instruments. Moreover, there are also other varieties of accordions found through out Latin America such as Norteño and Vallenato music from Mexico and Colombia respectively. It is composed of two sections connected by bellows: the right side contains buttons or keys which produce different notes when pressed, while on the left side there are bass notes that can be played in conjunction with those on the right side.