Two "amp-in-a-box" overdrives that players constantly cross-shop. The OCD leans tighter and more amp-like with more gain on tap; the Blues Driver is looser, grittier and famously dynamic — it cleans up hard with your guitar volume.
| Fulltone OCD | Boss Blues Driver (BD-2) | |
|---|---|---|
| Character | Amp-like, focused, slightly compressed — tight low end even at higher gain. | Open, gritty, a little raw — more "transparent-ish" with a touch of hair. |
| Gain on tap | Low overdrive up to near-distortion — the wider range of the two. | Low–medium; sweet spot is edge-of-breakup crunch. |
| Cleans up? | Yes, and it stays tight as you roll back. | Exceptionally — rolls from crunch to near-clean with the volume knob. |
| Tone stack | HP/LP toggle plus tone — can go bright and cutting or fatter. | Single tone knob; naturally a bit mid-forward and gritty. |
| Best for | A versatile main overdrive, tighter rhythm, pushed-amp leads. | Bluesy crunch, dynamic rhythm, players who ride their volume knob. |
The OCD is a tighter, more amp-like overdrive with more gain available and a bright/fat toggle — a great versatile main drive. The Boss Blues Driver (BD-2) is looser and grittier with a very dynamic, touch-sensitive feel that cleans up dramatically from your guitar volume. Choose the OCD for range and tightness, the BD-2 for dynamic bluesy crunch.