Well, I have both.............but I refuse to eat either one just to answer your silly question.
Guessing, I'd say the Trident would be easier to swallow - it's smaller
Seriously - Everything depends on BUILD CAPABILITY and personal preference. I've used Genesis atomizers for many months and fast found I prefer Kayfun's with Cotton or Ithaka's Dual coiled with 2mm silica.
The biggest decision in answering your question would be convenience. If sitting around, the trident would be a great vape. on the Go the Kayfun would be the better way to go.
And you did it again.........with the title........ Kayfun not Kyfun