The original buzz was vv, and the original infinity was vv. First there was the buzz vv, then the original infinity vv which introduced the wheel interface, then the buzz pro which went to an updated vv regulator, then the infinity pro which uses the same regulator as the buzz pro. Buzz vv was out before provari, darwin, any other production vv.
The buzz vv support
thread was started early july 2010, units were already in use then.