From a life standpoint, they are both completely retarded (in the strictest sense of the word). But because they have lived their formative years as reality TV stars, they display an intuitive sense of what the producers and the viewers are looking for from them, and they are more than happy to play the part.
The others are just trying to be themselves and seem somewhat sympathetic to the fans*. Meanwhile Speidi™ are a traveling roadshow of reality clichés, open for business.
* Well except Paula of course, she's just crazy.