Alternatives to the Mad Professor Mad-Rbo

Dunlop MXR Timmy Overdrive, sold as Dunlop CSP027

Shared character: grit, treble, subtle

Electro-Harmonix Spruce Goose

Shared character: pedal, grit, full

DOD Carcosa

Shared character: extreme_settings, pedal, wide_range

Boss SD-1 Super OverDrive

Shared character: pedal, grit, wide_range

Demon FX Full BB Preamp

Shared character: volume, full, boost

Demon FX Gladiator

Shared character: volume, treble, simple

MXR Super Badass Distortion

similar tone character

Dunlop Distortion III

similar tone character

Caline CP-15

similar tone character

Fender Breakup Drive

similar tone character

JHS Pedals Hard Drive Distortion

similar tone character

Dunlop MXR GT-OD Overdrive

similar tone character

JHS Colour Box V2

Shared character: pedal, full, treble

Electronic Audio Experiments Surveyor Instrument Voicing Preamp

Shared character: grit, treble, pedal

Electronic Audio Experiments Longsword V4.5

Shared character: pedal, boost, treble

Death By Audio Thee Treble

similar tone character

Dean Markley Overlord

Shared character: pedal, full, treble

Paul Cochrane Timmy

Shared character: treble, simple, transparent

Bogner Ecstasy Blue Mini Overdrive

Shared character: pedal, wide_range, boost

MXR M104 Distortion+

Shared character: pedal, grit, wide_range

Keeley KO-Als Distortion

Shared character: treble, pedal, distortion

Fender Full Moon

Shared character: extreme_settings, full, treble

Cusack Music Orthrus Distortion

similar tone character

EarthQuaker Devices Westwood

similar tone character

Wampler Tumnus Deluxe

similar tone character

Benson Amps Portable Distortion 424 MKII

similar tone character

Friedman Small Box Overdrive

similar tone character

JHS Charlie Brown

similar tone character