Does the Zakk Wylde Overdive have more bite than the Sd-1 becuase i hear Zakk Wylde uses the SD-1.
iBanez Rg550 20th Anniversary.
iBanez GRG170DX W/ Dimarzio Steve's Special
VTM 60 Tube Head
Carvin Legacy Vai Cabinet 4x12 Cabinet
Boss SD-1 Super Overdrive
ZW-44 Overdrive
Zakk Wylde Signiture Wah
I've personally tried both and the Zakk Wylde sucked balls. It just added more noise.

The SD-1 is a much better choice.

And no, Zakk uses his own pedal (I've seen his pedalboard from his previous tours)
The Zakk Wylde, oddly enough, is a modified SD-1 circuit, which has a little more output, and is 'tecnically' better (meaning, in theory it should be alot better)