don't think it was that bad a question. There is more focus on the fact that John owns it than it's actual sound here in fact .....
It sounds different to other wahs ... the thing which makes it different is a "multiple feedback op-amp circuit". You can read about op-amps here
http://en.wikipedia....ional_amplifier . I don't know much about them at all.
What it translates to sonically, I think, is a wider frequency "Q" peak. Most wahs have a very pointy peak that makes them sound thin ... I think the WH-10 when it sweeps, accentuates a wider band of frequencies. This makes it work better with fuzz and distortion before it, because it's not highlighting just fuzzy harmonic frequencies, a chunk of good signal lies in the range in which it's sweeping.
Another difference is that most wahs subtract from your signal with a RLC circuit and leaves one frequency at full volume, the frequency that is 'in tune' with the circuit. I think the WH-10 ADDS to the signal, and this is why it gets such a massive volume boost, because your normal signal is still there, and it has other stuff added on top.
These are my semi-educated guesses.