- let me just say that the LGW is not a bad sounding pedal. It just is not at all in the TS style overdrive category - and I have lots of experience there being a TS nerd. It has more of a square wave distortion going on - which is perfectly suited for some players. It borders on fuzz. And there is a stiffness to it that you feel in your fingers and pick attack especially when you try to do a legato run and that smoothness and fluid ease of motion is just not there. But the LGW does sound great cranking out the chords and keeping articulation. It does have a cranked class A tube amp sound that is definitely musical and I can see why lots of people love it. 
Well, practically everything is different. For fear of starting a hate crime war -
Straight from the Mad Professor himself:
As designer Bjorn Juhl put it:
"Whereas Little Green Wonder is a TS-style pedal, but one for those who don't generally like TS-style pedals.
Big difference between these two pedals would be headroom, distortion style and distortion depth and treble response, output level, function of tone knob, color, symbol.... they do share a common layout of mechanical components."
There is WAY more headroom on the LGW - which I could care less about...
The distortion is harder than any TS style pedal I have played - moving into Fuzz
There is a lot of SAG in this pedal as you turn up the drive and get into the fuzz
The eternity is smooth and creamy with more violin tone.
Both are great.
