Much greater surface area, so that part makes sense at least for flame-based cooking. I doubt it offers any benefit for non-flame-based cooking (elements, ceramic, etc. It might actually be a detriment because it would dissipate more energy. It goes both ways).
It looks like the inside of the pan has the same fins, which makes sense otherwise they'd have uneven thicknesses. That would be a serious cleaning issue.
It looks like the inside of the pan has the same fins, which makes sense otherwise they'd have uneven thicknesses. That would be a serious cleaning issue.