MIDI note number to note name/octave notation is not standardized.
As such, multiple ways exist, and ours and Ableton’s don’t match, but the MIDI note is the same.
Ableton :
- 0…127 → C-2…G8
Hermod:
- 0…127 → C0…G10
tl;dr: They’re the same MIDI note, different way of computing the octave number.