"Reiki healing energy" as a opposed to?

The ki in Reiki is just the Japanese way of writing and referring to the Chinese Qi or Chi. It refers to a fundamental energy which has a direction towards creative organization. It is much more than just energy, one could possibly say it is energy with brains and heart. As such it leans towards life in every form. Ki, Qi, Chi is everywhere.

The aspects which make Ki, Qi, Chi more than just dumb energy are encapsulated in the Kanji character Rei. This is to remind western people of that aspect because with eastern people it is so much part of their culture that it isn't even worth mentioning.

In terms of energy, Reiki and all other forms of Qi healing are the same and Reiki is only unique in the form of its implementation.