Take a look at the following pedals,
Digitech Grunge
DOD Grunge (FX69)
OR
Digitech Death Metal
&
DOD Death Metal (FX86)
Any resemblance? Both 'Grunges' have the same relic design, with the same name and even the knobs has similar names. Is it a mere coincidence? Or one of them imitate the other? Copyright infringement? Well, neither.
DOD is under Digitech. Digitech used to produce Death Metal, Grunge and other effects under the name of DOD. It is just recently when it decided to revise these DOD pedals and name them under the Digitech family instead.
