Some compare it to Caron pour un homme but I have never tried the Caron so I can't judge.
The Caron is smoother, in my opinion. There is absinthe in the Kilian that makes it sharper and stronger to my nose. Both are nice and I could see enjoying both in my wardrobe.
If I wanted to save some $ would getting the Caron be close enough to what I'm smelling with this fantastic taste of heaven sample? i.e. I could buy Caron + another nice frag for as much or less than Taste of Heaven