Dunlop MXR M78 Custom Modified OD, also known as the Bad Ass Modified OD vs Fender Godzilla Distortion Limited Edition

The Dunlop MXR M78 Custom Modified OD, also known as the Bad Ass Modified OD and the Fender Godzilla Distortion Limited Edition are both pedals sharing compressed, saturated, high gain. The Dunlop MXR M78 Custom Modified OD, also known as the Bad Ass Modified OD leans mid-forward and warm. The Fender Godzilla Distortion Limited Edition leans aggressive.

Similarity
citedBlended from circuit-archetype lineage, dynamic feel, tone-signal overlap and tone-vector distance — the tone vector itself is derived from editorial description text, not a measured acoustic signal, so this reflects how similarly the catalog copy describes the two, not a lab measurement. Shown only within a gear class, and only where there's enough evidence to be meaningful.

48% — somewhat different

Shared tone character
citedDerived from overlapping tonal signals across both listings.
  • compressed
  • saturated
  • high gain
  • full
Citation fame
citedCitation/mention fame — how often this gear is cited across artist rigs and gear discussion.
0%
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Description

The MXR M78 Custom Modified OD, also known as the Bad Ass Modified OD, is a vintage-voiced overdrive from MXR by Jim Dunlop based on the 1978 MXR Distortion Plus circuit with additional Tone and Filter controls added to increase tonal flexibility. The 1978 vintage Distortion Plus is known for its warm, smooth clipping character and distinctive compressed saturation that works well into an already-driven tube amplifier. The M78 extends the original circuit with front-panel EQ control that was not available on the vintage unit, allowing players to shape the midrange and frequency balance without requiring external pedals. It bridges the original vintage MXR sound with modern usability.

The Fender Godzilla Distortion is a limited edition high-gain distortion pedal released in conjunction with Godzilla promotional licensing, designed to deliver aggressive, heavy distortion tones inspired by the Japanese monster film franchise. The circuit draws on Fender Blender-influenced high-gain saturation with enhanced low-end weight and distortion character suited to heavy rock, metal, and experimental applications. The distinctive Godzilla-themed enclosure artwork makes it a collector item beyond its tonal utility.

Genres
citedGenres this gear is documented as being used in.
  • Classic Rock
  • Rock
  • Alternative Rock
  • Blues Rock
  • Experimental
  • Metal
Tonal lean
  • mid-forward
  • warm
  • aggressive
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