They don't really compare. The WF can come pretty close to copping the BB tone, and then does 1000 other things. WF is the only pedal I've really been using lately for dirt.
The only thing I'd change about the WF is to give it the ability to store 3 presets like the Sansamp BDDI so I could use 3 different settings on the fly. That's not really a complaint, just the only way I could possibly like the pedal more.
That would be awesome!
Multi channel rack mount doom.