I'll bite,
only thing I've really noticed is how great of a tool a box call is for Merriam's/Rios, Now a days I would never pull a box out east of Mississippi River. Other than that they are just turkeys, they are quirky suckers. As a hunter from the southeast I remember on my first trip to Merriam's country my friend and I were quite literally outsmarting the birds (If that even makes sense). I guess meaning trying to cut birds off as you would in the eastern hardwoods, that bird had cut the distance in half from us in under a minute and left us standing in the middle of the prairie wondering why the bird ran on a string into our calling. I've since made many more trips to hunt Merriam's and now consider them my favorite subspecies.