Just about everything except who makes it.Have you shot a EGO7? want to know the differences between the etek and the ego7
Personaly i'd take a e-tek over NXT. Mch prefer poppet valves and the quality of the e-tek is fantastic. I havn't shot an NXT but do own an SFT and even though the e-tek is 'mid end' and the NXT is 'High end'. I'd take an e-tek every single time.