i have the scythe flex G, and the gt 1850s, the scythe flex g is has a higher pitched noise at 12v, the gt @ 12v is just right, but if you want quiet, the sflex f or e, or the gt 1600s might be better. but the less rpm the less noise.

the gt i would pressume have better motors

****only way to satisfy your curiousity is buy samples, thats what i did