I am not military but I have to wonder about this. Wasn't the tunnel rat the most dangerous occupation in wartime Vietnam? Are you saying Saddam's tunnels are safer than the VC's? (Respectfully)
However, yes, obviously, they are much different. We are talking concrete (not mud) and modernized bunker-type tunnels more like those of Nazi headquarters. I'm convinced if we get inside one or two of these, because of his need to be mobile, it would lead to all others. Even if he blows one, you could probably dig through pretty quickly. And he can't blow all of them. So this is not at all like Vietnam.