Maybe both could work. You could also blend them both together using the Mix shader . How close is the camera?
When I was working on the aistandard surface shader, that is getting green at where two cylinders are coming close so I used aistandard hair shader...and camera is very close to the subject.
Do you have any renders and shading networks that you are able to share?
I'd advise using standard_hair to get the nice scattering. Nylon hair does not have scales on its surface so you should set the shift to 0 to get the "fake" look.
Unfortunately i won't be able to share those renders. because it's confidential.
As you said, i used aiStandard Hair shader to achieve look of the nylon. So Thanks a lot for your valuable time Lee !