I have both and this is my opinion.

The MAD Buck Growl is a very nice call. It will make good grunts but as already stated, if you blow too hard, is starts to "quack". I do not think I would try to get too aggressive with it. You can blow harder than other calls I have used but there is a limit. It's also a nice looking call. Be careful with it and don't drop it. There is a locking piece for the reed that will fall out and the whole thing is junk until you put it back together. It happened to me when I dropped it while climbing down from my stand. I have heard several people complain of this. The instructional mini DVD is OK.

The Primos Buck Roar is also very nice. This call will let you blow as hard as you want to without turning into duck call. Primos said that they "opened" the reed to allow this. The problem I find with this call is you cannot do soft grunts. You have to blow a good amount of air through it which imitates a dominate buck all of the time. This may be a problem in some situations. The snort/wheeze call attached to it is fine also. Sounds just like every other snort/wheeze out there. I also think this is one of the ugliest grunt calls every produced and they could have left off the Dick Tracy secret decoder compass. [:'(] The instructional mini DVD is nice.

I haven't had the chance to use either in the woods yet. I wlll be going out Friday and bringing both so I will let you know.