Final answer:
The hypervirulent NAP1 strain of Clostridium difficile is more dangerous because it produces extremely high amounts of toxins, leading to severe disease symptoms.
Step-by-step explanation:
The hypervirulent NAP1 strain is considered more dangerous primarily because it produces extremely high amounts of toxin. These toxins are capable of causing significant damage to host cells, leading to severe disease outcomes. Additionally, certain strains of Clostridium difficile, including NAP1, are known for their increased virulence due to various factors such as antibiotic resistance and enhanced toxin production. This does not specifically involve the endospore's resistance to disinfectants or a faster sporulation rate. Thus, the key factor for its increased danger is its ability to produce high levels of toxins.