Lyle a halloween guy? It depends on the zombie's attributes. If they are like Margarito and slow but never stop coming at you then they are going to be a bit scarier. If they are like Mike Tyson and really fast and scary but can be lasted out then I'd go with slow zombies. If they are fast and can't be slowed then yeah they are obviously scarier.

I think Michael is scarier then any of those zombies