Perhaps Rollo and Hiccup are debating whose show is a more accurate depiction of Vikings.
The kids were very impressed with the shrink wrapped subway car devoted to the "Vikings" television show. So impressed, in fact, that we had to wait ten minutes to ride in that particular car rather than in a regular car that did not have a large picture of a bare chested man on the outside and laminated photos of fur seats on the inside.
The "Vikings" train led to a discussion of which sort of Viking was more realistic- this particular show or Dreamworks' "Dragons: Defenders of Berk"
No doubt Hiccup's hair, makeup and personal trainer budget is smaller.