Try Breech the Void/Meshuggah. I think these guys are breech the void or a few guys formed this band . The song NEO from Neosis is almost the same as Breech the Void's Customized Genotype. Check em out.
I love the clean vocal layering. Might be a bit too falsetto for some, but you know. I am a fan of the melodic death metal band Into Eternity and this guy sounds almost identical to their older singer in the higher octaves.
you need to make some researches... i own the first etna 3 song ep and its clearly written behind who composed the songs. and of course they know each other they all played in etna and then the 3 members left then etna became btv and the 3 other guy made neosis. also i think the guitarist of neosis and the drummer of btv are brothers.