Project Managers and Scrum Masters both play essential roles in the field of project management, but there are some crucial differences between the two. The methodologies, responsibilities, and objectives of the two roles are quite different, despite the fact that both are in charge of ensuring that projects move along and are successfully completed.

The method of project management is one of the key distinctions between Scrum Masters and Project Managers. Scrum Masters employ an agile methodology that emphasizes incremental and iterative value delivery. Project Managers, however, typically use the more traditional waterfall methodology, which entails defining the project scope, developing a plan, and carrying out the plan in a linear manner.

The differences don’t just stop there. The focus and responsibilities of Scrum Masters and Project Managers are two more significant distinctions. The primary goal of a Scrum Master is to streamline the work of the development team, assist them in adopting Scrum, and remove any impediments or roadblocks that are getting in their way. On the other hand, project managers are in charge of the project's overall direction, coordination, implementation, and execution.

Another difference can be seen in their respective levels of authority. Scrum Masters serve as coaches and facilitators more so than as direct supervisors of the development team. On the flip side, Project Managers play a more authoritative role and are in charge of making decisions regarding the project as well as making sure that it is finished on schedule and within budget.

The last key difference can be seen between aims and objectives of the two roles. A Scrum Master's main mission is to support the development team in meeting its goals and to produce high-caliber features/functionalities sprint after sprint. A Project Manager's objective is vastly different as his/her focus is on completing the project on schedule, within budget, and with the required level of quality.

In conclusion, despite certain similarities, Project Managers and Scrum Masters have different methodologies, jobs, levels of authority, and objectives. Ultimately, the appropriate job for you within the project management space depends which role aligns best with your skills, interests, and career goals.