Well, as I have said a time or two in other posts, I bought the 612 on the recommendation of the great folks at Johnny Stewart ( HS Now ). They told me that the preymaster was lighter yes, but in that you give up durability. You can also get every JS sound that is out there, you can't do that with the preymaster, you are limited to the sound cards. The cords for the speakers are a whole lot better quality on the 612. The sounds on the preymaster are recorded off of the tapes (that is what HS told me anyway ). I went with the 612, spent more money but I feel it was worth it. As far as toten the 612, it comes in a nice camo bag with a shoulder stap. I have 13 tapes, the call, speaker w/ 80' of cord, spare gloves, extra ammo, and a few hand calls in my bag. IN my opinion, if you are not going to spend the extra money for the FoxPro, buy the 612, it is so much more versital then the preymaster, In my Opinion!
An other point would be that the sounds only play for 60 seconds and then you have to push the button again, the 612 plays for 30 minutes of continuous sounds, to me if I have to keep pushing buttons every minute, then that is that much more movement, and that much more time I am not looking for coyotes and worring about the call.
Both calls will call coyotes if used correctly! I hope this helps, best of luck to you!