Yes and no. The basic building blocks of Kingwa's designs are the same from what I can see, but if you look at the Fun and the NFB-5 specs, you'll see the latter has a better S/N ratio and the TOTL DACs have what appear to be measurable improvements over time. He has, since the Compass, primarily improved the digital section including the DAC (AD1852 vs. dual WM8741), input receiver, USB receiver and (I hope in this) the receiver clock. I'd take a bet that the headphone amp built in wont be much different, if at all, from the Fun, Sparrow or NFB-12's.