Greater than 100% ‘regen’ simply boost the gain of the signal going into the feedback loop thus oversaturating the audio signal circulating in the plugin. This gives you the option of sustained, aggressive distortion, as the audio over unity is caught by the non-linearities in the device. Enjoy!
One of the key sound design features of Diffuse is this ability to sustain through constant recirculation whilst offering the characterful differences of the saturation algorithms between 100 and 150 % settings.