Your best chance of calling in and nailing a weary bird is to worry more about how much you call, rather than trying to figure out all the different types of calls they produce.
Example, lets say you get one roosted the night before. Next morning, while being as silently as possible, no talking, no whispering even, set yourself up 50-75 yds. from his roost. If hunting flat land, have your decoys or shooting zone so it will put the birds within 25 yds. or so when they come into sight. If they are roosted on a slope, you want to approach from either the back of the slope, or make a wide approach that guarantees they won't see or hear you coming. Then set up above their roost, never try to call them down hill, this is a common mistake many turkey hunters make.
Once you've got yourself all set up, wait until it is good and light out before doing any calling at all, so don't make a single call until it is light out. And absolutely, positively do not use a location call, or try to shock gobble them. those tactics have a another time and place, not when you already know where they are. So, once it's light out and while sitting perfectly still, with shotgun already raised and ready, as softly as possible, just barely scrape the tongue of the box call across the box, I mean really, really soft, barely audible soft. Once you do that, they'll sound off, and they'll usually fly down, often nearly landing in your lap. I would have to say that better than 80% of the birds I've called in from the roost landed right in front of me with nothing more than that one single scrape across the box call.
Once they start to come in, don't move, and don't try to turn around to get a shot at him, let him step into your shooting lane. Decoys are extremely helpful at getting them to enter your shooting lane, other wise it's a game of getting them to wonder into view. I've had to let them get bored and walk away, and call them back in multiple times, before I got them in front of me.
GS