The son is the bigger one.
This is for a contest vs another builder named Roa (or Archinto): [link]
I don't have the pieces for the original Kohrok so I improvised a bit.
For the "Son", I used that giant trans blue head as a Krana because it contrasted better than any other color without being too sharp. Other than a few parts, this is almost purely Bionicle/Technic.
I also added in my new name tag that I made for Brickfair. I need to take more pictures of that later.