Both are rugged. It seems like the stand for the Otter box is the front cover, but the stand for the Griffin is a separate piece. That's the way the pics look to me.
Although it seems that the Griffin has hinged covers for the ports, don't know if the Otterbox covers the ports. I like the covered ports, keeps out the PBJ and such.
Also the Griffin has a built in screen protector to seal the front.