Mate or Soul mate

Mate, soul mate? Is there really a difference? Ace has just moved in next to someone he's certain is his mate. But she knows nothing about wolves or even that she is one. Its clear that there's something wrong with that picture.
That's not the mystery on his mind though. What Ace doesn't understand is why she can't feel the bond yet she feels one with someone else. Someone who claims to be her mate. Ace's father's trusted psycic reveals that in extremely rare cases, it is possible that one of them is her mate and the other her soul mate.
But which will she choose? Mate or Soul mate.