Matt Morrett's reply:
Great question, and honestly in some circumstances it is impossible to tell the difference. In many cases jakes that run together can be the dominant turkeys and when they gobble they do it together. But, for the most part a jake gobble sometimes is a half-gobble and can and will have yelping attached to it.
The fly-down cackle is a build-up of soft clucks and then a fast series of clucking or cutting imitating the hen leaving the tree. There is no definitive amount of notes; you just want to sound like you are leaving the roost. Best of Luck.