Şahan Arzruni was an ethnic Armenian classical pianist whereas Shavo Odadjian was known for what?
Şahan Arzruni: Şahan Arzruni (Armenian: Շահան Արծրունի ; born 8 June 1943) is an ethnic Armenian classical pianist, composer, ethnomusicologist, lecturer, writer and producer, residing in New York City. 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