Sperry had been experimenting with aircraft loaded with dynamite (Curtiss N-9 aircraft, to be exact), Kettering brought together a group to make his concept a reality.
So tell me what the difference between the "Bug" and the V-1 was.
Both were built around an explosive, which had wings attached and a means of propulsion.
Both had a gyroscope for guidance along with a device to measure distance, which automatically shut off the engine at the preset point.
The gyroscope in the V-1 was the patented invention of Sperry, who also provided the guidance system for the Bug.
Several sources, including Jane's, USAF and US Army history archives, etc. consider Kettering's project to be the world's first cruise missile - predating the V-1 by twenty years.