What are the differences between pursuing a PhD with a master's degree and pursuing a PhD without a master's degree?

The main difference between pursuing a PhD with a master's degree and pursuing a PhD without a master's degree is the length of time it typically takes to complete the PhD program. Having a master's degree can sometimes allow students to skip certain coursework and complete their PhD faster. Additionally, having a master's degree may provide a stronger foundation of knowledge and research experience, which can be beneficial during the PhD program. On the other hand, pursuing a PhD without a master's degree may require students to complete additional coursework and research to meet the requirements of the program.