Different scenarios with same references

Is it possible to have different scenarios that all point to one set of references?

I have some pages with different base fonts (16px / 10px) and I need to serve different CSS files, but the end result in those components on those pages are suppose to be the same.

So basically you would have one source of truth with multiple scenarios using the references of one particular scenario

Scenario A : create references
Scenario B : do not create new reference, use same references as scenario A

That way, if scenario A & B fails, you create new references on Scenario A. If scenario B fails and A passes, you know that B needs fixing.

This ensures that if Scenario A and B pass, it's because they are exactly the same.