Alternatives to the Ernie Ball Expression Overdrive

ProCo RAT 2

Shared character: smooth, overdrive

Boss SD-1 Super OverDrive

Shared character: durable construction, overdrive

NuX Drive Force

Shared character: gain, smooth

Amptweaker Tight Boost

Shared character: wah, gain

Xotic BB Preamp V1.5

Shared character: gain, smooth, clean

Strymon Riverside

Shared character: gain, smooth, overdrive

Greer Lightspeed Organic Overdrive

Shared character: gain, smooth, overdrive

Dophix David Overdistortion

Shared character: gain, smooth, overdrive

Chase Bliss Brothers AM

Shared character: gain, smooth, overdrive

Dunlop MXR Jail Guitar Doors Overdrive JGD2

Shared character: gain, overdrive

Friedman BE-OD

Shared character: gain, smooth

J. Rockett PXO Phil X Signature Overdrive

similar tone character

MXR CSP039 Duke of Tone Overdrive

similar tone character

EarthQuaker Devices Scrolls

Similar voicing: ambient, dynamic

Electro-Harmonix Expression

Shared character: expression pedal, performance, gain

Ibanez WH10V3

Shared character: wah, gain, smooth

Univox UD-50 Uni-Drive

Shared character: overdrive

Dunlop Cry Baby SW95 Slash Wah

Shared character: combination, wah, gain

Sonicake Rude Mouse Distortion

Shared character: gain, smooth, clean

Boss BD-2 Blues Driver

Shared character: durable construction, gain, smooth

Bixonic Expandora

Shared character: smooth, overdrive

Electro-Harmonix Spruce Goose

Shared character: performance, gain, overdrive

Maxon OD808

Shared character: smooth, overdrive

Silktone Overdrive Plus

Shared character: smooth, clean, overdrive

MXR ZW-44 Berzerker Overdrive

Shared character: gain, smooth, overdrive