Maybe.
If that were the case, what differentiates one group from another?
Well in absolute terms (, and if I remember correctly) - a first take would be two different "buildups". Two different "native tribes", like genetics. Two different families.
A circle person wouldn't get well with a pyramid person, in the first place, and/or without conscious efforts, because the two factions seem rather antagonistic, and it seems related to two different "races".
I am remaining cautious so as not to bring by that the above dichotomy is about Organic Portals ("The other race") & humans, aka Adamic and pre-adamic, or even something akin to STS vs STS. That is because I do not remember exactly if it is the case. So I am left with "circle people", "pyramid people", two tribes, two distinct "genetics", two different affinities.
So I don't attach an automatical pejorative view to circle people, even if they have been described as the people to watch out to. That's because I estimate that the STO road is walk-able by everybody, and that circle people are no exception. It may be that there are STO circle people, somewhere, which would diminish an automatical discrimination of circle people per se. But, it has been said that circle people were at the origin of, let's say, some troubles, and I know that I must watch out.
I can perfectly see that you are hinting at an antagonism of this type, with the ark faction and the grail faction. It makes sense. So the idea would be that the Grail is a spiritual principle, bound to pyramid people, because of their genetic. Or, a tool that which would work only with pyramid people.
I was left with the idea that the Grail was an STO principle, like the Freemason "great work" (I know they call one spiritual discipline of tehirs, "polishing one's stone", to indicate a slow refining process of spiritual growth), so that it would be ultimately only something akin to "STO graduation" - or the acquisition of a positive "body", for example something immuable and permanent.
But here, the exchange hinted at a device, used as a tool of some sort. Performing one function, in a context of "access". Completely changes the scope of the "Grail".