It's a misconception that the voicings of the Tone Block 202 and the OverDrive 202 are identical and the only difference between these two models is the OD202 having two channels (clean and overdrive).
However, this is not the case. While they do share some similarities, the voicings of both amps are a bit different from each other. Here is a quick breakdown of them:
TONE BLOCK 202
1. The FRFR voicing in the TB202 is a flat response with speaker dampening. This is ideal for those using modeling rigs and/or cab sims.
2. The FULLQ voicing on the TB202 brings out a more "honest" tone of your guitar while bringing out a warmth in the speakers.
3. The VINT voicing on the TB202 is a Fender-style tone stack with added bass and chime.
OVERDRIVE 202
1. Voice 1 will bring an "honest,' natural tone from your guitar. It is similar to the FULLQ voicing but with a bit of added treble.
2. Voice 2 will have a "bell-like tone" and improves definition of chords in both clean and overdrive settings. This voicing is inspired by a certain very expensive and unobtainable high-end amp.
3. Voice 3 is a Blackface-style mid-scoop. A bit similar to the VINT of the TB202, but with a more metallic styling.