Two cities · plumbing
Two plumbers who would never write the same page.
The electrical pair are two shops in one trade and the HVAC pair are one shop at two sizes. These two are further apart than either: different cities, different housing, different problem. Portland is pre-war stock with cast iron and roots in the lateral; Minneapolis is four months below freezing and a lot of buildings with forty tenants in them.
They also look nothing like the four above, on purpose. Three of those share one design system, and a sixth page in it would have started to prove the opposite of the point — so this pair is set in its own: printed rules, a slab headline, and no photograph on the first screen at all.