the hot dog is ok, for howling, but then I got a custom call from Tony Tebbe, and there is no comparison, but it works, so I would get used to that, then step up to custom, as it will be easier I think at least, to go from a hot dog to a horn howler,
The ki-yi is good for ki-yi'ing and distress if you can get it loud enough I think,
Both are overall good calls, and should produce coyotes, if they are there to produce,
My .02
Simon R.