Why do you say that Karuna Reiki® is more powerful than Usui Reiki?

We teach Karuna Reiki® only to people who are already Reiki masters and most of these students received their mastership from other lineages besides my own. In fact those who take the classes represent a wide range of teachers in the Reiki community. The general response of these students is that Karuna Reiki® is stronger or heals more deeply etc. than Usui Reiki. It is from the response of these students who are already Reiki masters and have a great deal of experience working with healing energies that this information is presented. It is asked that this idea not simply be accepted, but that anyone who is interested in Karuna Reiki® receive a Karuna treatment or take a class or talk to those who have and from this information form one's own opinion. However, it must be understood that Karuna Reiki® is not a substitute for Usui Reiki or any other kind of Reiki, but simply an additional technique one can use to promote healing.