I did a lab investigation in to the sound differences, which occured between 1.04 and 1.05, and again between 1.05 and 1.06.
Summary: Going from 1.04 to 1.06, 1.07, or 1.08, the only sonic change is that bitcrush has a more consistent volume across its range, but is the same at full. If you have patterns with bitcrush settings, they will change apparent volume for some intermediate settings.