I prefer EATPM over SS but would suggest to give the later a try... There is nothing wrong with scared stiff. It is relatively easy to achieve the 6 tales of terror. On the other hand, I could never complete all objectives with the spider... can't even tell if there is a reward associated. But I owned neither.
SS has a good theme and will be easy to sell when/if you are bored of it... if you buy EATPM again, you'll never know which one you truly prefer!