I don't own either one, but my hunting buddy has both of them.
X360 is the best sounding call I have ever heard. Very realistic when the sound is alternated between the 3 speakers. The better sound coming from it might be advantageous when dealing with conditioned coyotes..The thing is very heavy and since I walk quite a bit , that is a no go for me.
The freq's only niche is the ultrasonic sounds it produces. I have done quite a bit of research into that realm and it hasn't been decided exactly how far the ultrasonic sound travels. It would not be worth it to me if that callers high frequency sounds only reach out two or three hundred yards while the normal sound covers the rest.
With today's coyotes being hammered day and night, a person's woodsmanship skills , his knowledge of coyotes, and his ability to use a hand call is worth considerably more.