just about any hand call made today is of good quality and will call in predators.buy closed reed and open reed calls and practice with them untill you sound like your dieing.a good place to find calls is www.allpredatorcallss.com this one site carries a real good and large selection of calls,take a close look at the verminator series.as far as being a difference between east and west,no not realy.the main difference is the easterns get bigger.the biggest difference is in the way you hunt them,tactics here in the east are a little different becouse we are in thick country and you just can't see them like you can in some western states.theres alot of speculation on how and why the eastern coyote is much bigger then his western counter part.it would make sence in thinking its becouse there inner bread with wolves,and this is problably what happened.but on the other hand,in the wild a wolf any wolf will kill a coyote on site.they are bitter enimies and wolves will not talorate coyotes in the same area so its realy hard to say.