BobCAD may very well have many more toolpath options plus support for machining solids and surfaces that V Carve Pro doesn't have.
BobCAD is a full 3D package, and V-Carve Pro is really just a 2D package with V-Carving.
I don't really have any experience with BobCAD.
But. Someone on another forum was trying to V-Carve an Aztec calendar. It was taking over 30 minutes for BobCAD to calculate the toolpaths, and giving a lot of errors. The BobCAD rep blamed it on bad geometry. The user posted the .dxf file, and I loaded it into V-Carve Pro, which calculated the toolpaths in 17 seconds. Over 100 times faster, and with no errors.
This may be an isolated example, but if you plan on doing a lot of complex V Carving, you might want to take that into consideration.