I use a Belt Man 1.5" belt every day for carrying and for competitions. And I just bought my wife a Dickies work belt as a stop gap until her Belt Man belt arrives.
I would say my belt is nearly twice as thick as a "normal" belt. It's very stiff, and helps carry the weight of my gun instead of just distributing the load. I use to carry with a Dickie work belt and it wasn't bad, but using a proper gun belt is just so much better IMO.