I run the Bando's on both my Nissan's - which drive the clutch fan off the back of the belt - and it also goes around the tensioner back sided. They are smooth but almost feel tacky. the only belt I have ever had squeak was an OEM belt - but it was pretty old. The Bando's I get are made in USA.
I obviously don't care. I started using Bando's many years ago based on the recommendation on another automotive site.
In fairness I don't run my belts a really long time.