I'm glad you brought that up.
oratory and
crinacle measure using Gras 43AG and 43AC couplers, measurements by Ollo are done in a GRAS 45CC
oratory's FAQ mentions that the same headphone may have different measurements, depending on the rig, see graph below:
View attachment 133440
I don't see how the manufacturer measurements can be invalidated because of your comparison.
They are measurements and as such could be validated or not by measuring on our own, by someone with a comparable rig.
I don't have access to measurement equipment.
So I take them at face value. Why? Because it I think it would be really bad PR if a manufacturer publishes measurements that don't correspond with real data they captured. They don't need/want that, as a new actor in the market.
Guidance with references is provided to people who ask for recommendations.
In this particular case, the OP is not interested in the brand because he'd rather buy local
These headphones (Ollo Audio S4R or S4X) are out of my current budget, so sending them to Amir is not an option for me.
I guess you will double check my assumptions, although I don't intend to convince you.
Narrowing scope, defining specs and finding a product is a past-time for me, it's fun.
People read our recommendations and then make an informed choice, we're not forcing them.
KM