On the octave mode, things can get really nasty, splashy and gated. It's great for high gain leads, specially when played above the 12th fret. With a little less Honey you can get that "purple haze" tone. At low gain settings it can produce "ring modulator" overtones, great for textures.
The best way to achieve a well pronounced octave, is rolling back the Pre and tone control of your instrument.
The balance between the Pre and Honey is the key to achieve a variety of different sounds.