The ones with the head planted central on the body look dorkier, ive seen a few like this. theres 2 places you can put a head on a spider, at the front is the cooler one, planted on top is the cuter look.
But the dorkier one has a lot more space for a big chopper mouth, scary. I was going to say "brain space" but a brain can be anywhere in a robot, so i guess its more functional space in general.
heres a video of one like this in action.
https://www.youtube.com/watch?v=R0LKhXvMF1c