Amahiro's sound blends musical genres of polynesian heritage with musical influences of the globalized world in a "unique mix of singing and playing that evokes passages of rock and blues mixed with notes of a broad range of musical genres, in a constantly evolving style with permanent presence of a tribal core that reminds its indigenous ancestry".

The lyrics are inspired by the island life, culture, history and Mario's personal experiences, and while his particular songwriting style draws narrative with the sophistication of poetry, his singing drives the music with character and rawness, that combined to its indigenous origin, a rocking attitude and the blend of styles was defined by himself as "Rapanui Rock Fusion", 

​His music stands out for the eclectic creations and global nature of the sound that are welcomed by audiences of all kinds.