Which Theater of Operation Was Worse?

If you had the opportunity to serve in both Iraq and Afghanistan, which theater was worse for you, and why?

For me, it was the terrain of Afghanistan. The wadis, mountains, hill tops, snow, etc.

Even if you didn't serve in both Campaigns, let's hear your thoughts. please, only those who left the wire (not in an aircraft) and actually experienced the environment/elements should be commenting.