Final answer:
The primary distinction between ERP II and ERP III systems is ERP III's emphasis on cloud computing and scalability, providing considerable advantages in flexibility and accessibility.
Step-by-step explanation:
The major difference between an ERP II and ERP III system lies in Features related to cloud computing and scalability. ERP II systems expanded upon the original ERP systems by adding web-based technologies, providing more integrated external data and a more collaborative environment. However, the advent of ERP III systems has taken these integrations to the next level by incorporating cloud computing, allowing for greater scalability, flexibility, and cost-effectiveness. These systems are designed to be accessed through the Internet, enabling real-time data and processes to be available anytime and virtually anywhere.