OK, I will weigh in on the burners. First of all, they are for two different grills. One set may simply be a little longer than the other. Also, they are different in shape and therefore on may simply use less material by design.
If the guy really wanted to review the burners, he should have found out what material each were made of. Then, he should have commented on their shape and design and then maybe compared the flame level of each. I think that would give people a better understanding of them rather than one weighs a few ounces more than another.
I agree with Larry on the roto burner. While i don't know much about IR burners, I think the one on the Napoleon is a regular burner. It seemed clearly different than the one on the Napoleon's side burner which was an IR burner. The fact that the reviewer didn't mention the uneven heating on the roto burner along with the trouble he had lighting the burners on the Napoleon and glossing over it leads me to believe that his self admitted bias was poking through on this review.
Without personally ever seeing either grill in person, I would have to agree that the Napoleon offers a bit more. But, i wouldn't make my choice based on that video review.