This is a great overdrive and liked by many. I compared it with my old Fulltone OCD and found them very similar. The ODR-1 Bass Cut and the OCD HP/LP seem to do pretty much the same job.
There might be a slight bit of higher clarity from the OCD-1.
The Spectrum control knob seemed to adjust the volume as well, so I had to compensate all the time. Perhaps just part of dialing in, but not needed with the OCD.
So the ODR-1 was not enough to knock off the OCD for me. The differences are in some forums described as big, but I could not really tell the difference. Either I am not trained or musician enough, or the nuances are exaggerated.
Pros:
Good solid OD.
Nice clear OD sound, lots of character without missing the task
Bass Cut is useful
Cons:
Spectrum tweaking adjusts volume as well