Wax is a little different "animal" to work with...meaning you are constantly have to heat the material to work it. That being said, I wasn't very familiar with those techniques using the castilene to be a fair comparison. However, I really liked the Cx5. One nice thing about using the wax was not having to worry about armatures. The medium is rigid enough to support itself, and if you had to chop to re-work an area...

This was work in progress, and might be the best photo you'll get for the face...apologizes for not photo documenting more of this piece...