Good to hear from a Purism employee that I’m wrong. I assumed that based off the fact that virtually every other manufacturer of new Linux x86 laptops (ThinkPenguin, System76, Station-X, Tuxedo Computers and Slimbook) uses Clevo and this post by jjakob seemed to confirm it:
Could the closeness between the Clevo and Purism designs be caused by both using the same Intel reference design?