Writing a research proposal for a PhD is different from writing a research proposal for a master's.
In your proposal, you will address this section depending on your course of study. The requirements for a PhD are different from the requirements for master's.
The scale of a project for a master's is less than for a PhD, so reviewers expect the scope of the project to be different. This will be evident in sections where you are required to detail aims and methods, timeline and budget.
PhD students are also required to list milestones that need to be completed in the first 12 months to confirm your candidature.
For master's and PhD, you need to follow the guidelines for writing a research proposal.