Biologically, male and female bodies may produce different chemical compositions, which can affect taste and scent. However, individual variations surpass gender generalizations, so experiences may differ regardless of this factor.
Personally, I much prefer the smell of it than the taste. Based on my experiences over the years, I would describe the taste of a woman's asshole as being slightly bitter. To me, the bottom line is that the smell of female butthole is my favorite smell in the world.