A dyno is just a tool for comparing how well a set of mods improve over a stock baseline. Using numbers from one dyno to e-peen over other people's numbers from another one is pointless.
I have been on many dynos, and worked at a shop where we had a Superflow load applying dyno. I could make the numbers show whatever pleased the customer if I wanted, so many settings that directly impact the results without being obvious.
Preferred to leave it at SAE and get realistic results for upgrades, but some people absolutely would not be happy without hitting the aftermarket manufacturer's dream world numbers, often with each parts marketing claim added to each additional parts claimed HP boost. Sometimes you just get tired of running endlessly for people who have no grasp on reality and dial up the results just to make them shut the hell up.