 Where UK hard house has uplifting, playfully fun and tough elements, NRG is ominous, dark, aggressive and relentless with its distressed, menacing and gritty sounds on a slightly faster BPM (155–165 average) than UK hard house (150–155 average).In regard to the mechanics of the scene, many of the labels have made a shift from purely vinyl releases to CD single releases and digital downloads.Record labels which produce the genre include Vicious Circle, Flashpoint, Tidy Trax, Kaktai, Tonka Trax, Tinrib Digital, Noir Records and Noir Digital.