Here is my video comparing my newly acquired WH1 whammy pedal with my older WH4 whammy pedal.

My WH-4 has been modified for true-byass as found here:
http://www.rodrigoconstanzo.com/wh4

The WH-1 is running through a true-bypass looper to make things fair.

Which one sounds better? It's a tough call. Much closer than most people would have you believe.

For more info check out:
http://www.rodrigoconstanzo.com/whammy