Noticeable Difference:

TuffRib VS Standing Seam Metal Roofing 

TuffRib is a standard 4x8 metal sheet. The installation method leads to face screws, over lapping sheets, and no custom parts. 

Typically, the bottom eve or edge is not sealed. Leaving an opening to uplift and unnecessary noise. 

Standing Seam is designed to eliminate face screws, and with custom accessories the roof is interlocked and sealed.