I dont really remember much when I first them, about 25 years ago.
The films influenced a lot of my visual imaginations.
I am currently listening to them on Audible as I work and thus far nothing has come across as Roman.
I do find the tech level thing a bit odd.
I mean tech level Middle Eastern?
What time in the Middle East, 600bc, 200ad, 1900 ad, 2018ad?
No where in the Conan world (rightly or wrongly) would I think of gunpowder and probably not crossbows either.
Though plate mail and siege engines are mentioned.
I am rambling now..