"Completely dependent on other design considerations. Don't confuse span loading with wing-loading. Span loading is typically a function of wing design. Wing loading is nothing more than the weight of the aircraft in a specific configuration divided by the wing area. Ultimately, wing-loading has no impact on the structural qualities of a wing. It does however, impact the aerodynamic qualities."
A higher span heads to less G-tolerance, while chord at the root does not. Just wondering.....