As a manager, I would first listen to both Ron and Sally's perspectives on the issue. I would then review the company's policies and procedures to ensure that they are being followed. If Ron is providing efficient service within the company's guidelines, then I would acknowledge his success and perhaps offer him a leadership role in training other employees on how to provide speedy service.
However, if Ron's approach is not meeting the company's standards for professional behavior, then I would work with him to find a way to balance his efficiency with the company's expectations for customer service. I would also work with Sally to ensure that she is meeting the company's productivity standards while also providing excellent customer service.
In my previous experiences, I've dealt with different work styles by first acknowledging that everyone has their own unique approach. I've found that it's important to communicate the company's expectations while also allowing employees to find their own way of meeting those expectations.
I have seen conflict arise due to different work styles, but it's important to address the issue quickly and professionally. In one instance, I saw a manager work with two employees who had different approaches to customer service. The manager met with each employee individually and then brought them together to discuss their differences. The manager helped them to find a compromise that allowed both employees to meet the company's standards while also staying true to their own work styles.
If I were in this situation, I would work with both Ron and Sally to find a way for them to meet the company's expectations while also allowing them to maintain their unique approaches. I would also encourage them to communicate with each other and find common ground. Ultimately, the goal is to provide excellent customer service while also allowing employees to work in a way that makes them feel successful and fulfilled.