Do you belief that performance appraisal and performance management have differences?

yes difinately

the appraisal is a tool that is used to evaluate your current and goals that you have being created and expected to perform so that they know the status of your performance.

perfromance management is the way you manage the performances, it could be for the individuals, departments and organization using other tools of evaluating the current status of them like the KPI, Balanced Scorecards, etc. it also have strategies in how to brings the performance up as much as possible. but appraisal mainly focuses on the individuals and give us their current status of the performance.