Şahan Arzruni was an ethnic Armenian classical pianist whereas Shavo Odadjian was known for what?
Shavo Odadjian: Shavarsh "Shavo" Odadjian (Armenian: Շավարշ "Շավո" Օդաջյան ; born April 22, 1974) is an Armenian American songwriter, multi-instrumentalist, music video director/editor, music producer, and artist/painter. Shavo Odadjian:  He is best known as the bassist, backing vocalist and occasional songwriter of the Grammy Award-winning metal band System of a Down.
i don't know