At a width of 222mm (8.74 inches) the Xigmatek Utgard is wide enough to easily accomodate any of the 160mm tall, tower style, cpu heatsinks and still have room on the side panel for a case fan.
The Hades is 200mm (7.87 inches) wide and can also accomodate tall cpu heatsinks. Not quite sure about a fan on the side panel.
I took a look at the specifications and photos. I am fairly certain the Xigamatek has better ventilation, airflow, and cooling.