Ill ask my father on which one he has it seemed to work pretty good from what i seen. Now if you use one there are certain things you gotta keep in mind.
1. If you use the call as a distressed fawn you are gonna get mommas coming in fast and on high alert. Doesnt matter if she had a fawn that year or not they are naturals for fawn protection. So if you are bow hunting they will not stay long and will be on the move to the area of the sound and on in search of the fawn. Last season my father about 300 yards from me with the xbow did this and seen 4 does withing 15 minutes from different directions but where moving too fast and not near close enough for me to get a shot.
2. You can expect the possible visit from a predator especially yotes if you have them in the area. The noise attracts them as well so use it wisely because if you are hoping for buck or doe at that time and a yote comes in it may spook everything. As said it may be something to give a shot just before heading out of the woods for lunch or something just to see what may come in.