The RLM guys have also been amateur filmmakers since they were kids and most of them have/had jobs related to videography and editing, which means there's way more effort put into the video part of their videos. Doug and most other CA contributors were just random nerds filming theirselves in their bedrooms. Of course, RLM's reviews are also actual reviews instead of plot recaps with skits.

(Maybe it's just me but I believe the Plinkett reviews kind of ended up originating the video essay style of content)