Not terribly longer. Just 7' on the Amp and 15' on the Volt. As long as they're all within 25' of each other, we consider them to be in the same ballpark:
Shock • Volt • Amp
The other thing to consider is that this is based on a limited set. Once more of our data sources are updated to include the flight ratings for the new Shock, these values will likely change (although probably not by all that much).