Hi Karthika,
I do understand what you're saying, about all energies coming from the same source. But, different systems do have a difference (of course they do...or else they wouldn't have different labels...silly me

).
But since kundalini reiki is what caught my attention, I am confused since in Usui reiki manuals, we are either instructed to use our intention or think "reiki" to call in the energy. Yet in KR1, the exact same thing is said. It is what's playing with my mind and why I'm digging this.

So each Reiki modality comes wz a manual of instructions,to guide us to use it correctly...as it is structured...and above ALL our own instincts as Reki healers will guide us.
Well in this case the manual is instructing us to think "reiki." But something isn't right considering what I wrote above.
Sorry if I'm becoming stubborn. Perhaps someone attuned both in Usui and Kundalini reiki solve the mystery?