What are the technical differences between VC+ on the PB and PRVC on the servo? In theory they are very similar. Do they have a similar algorithm? If the peak pressure achieved with PRVC or VC+ lower than with VC? The servo has only square flow pattern on VC and the PB has a decelerating flow pattern even on VC. That may make a difference regarding PRVC or VC+ achieving a lower peak pressure.