I recently rented a Four Winds Majestic and it had tremendous wind noise. Later I bought a 1991 Lazy Daze and it runs very quiet. No noticeable wind noise at all.
It probably depends on the maker.
Also the rig I rented had the front window on the over-cab and my Lazy Daze does not. Perhaps that window was the source of the noise?
I should add that the rental had no awning and my own awning goes into a box with no exposed arms.