I have the Delta 46-701, the predessesor of the 715, made around 1997. I
replaced the belt because it was making alot of noise and causing some
vibration. Bought a link belt and now I almost forget the thing is running.
Beats my old Grizzly Heavy Duty all to heck. Can't say about the Jet because
I haven't tried one, but I'm sure happy with the Delta.

Earl