Volpe... the steel frame can't be beat, and weight between the two is right on. I've sold both and the Jake is more race/performance oriented than the Volpe, in that its a more cyclocross specific bike. The Jake is cool and beefy, etc, but it is very stiff... the steel frame of the Volpe has a great ride quality to it. I would however swap the suspension seatpost for a fixed model. Either way though you can't go wrong.
commuter turned bike mechanic turned commuter (also a Velocity USA employee, but this is my personal account)