The two main part of Control M software is Control M EM, and Control M Desktop.
Control M Desktop is where the user has access to make create/modify jobs, create/modify dependency, create/modify calendar, create/modify resource etc can be done and write to the Control M database permanently. This will need admin access to control M. All the jobs will be shown in urple colour as this is in development.
Control M EM is basically to monitor all the jobs that are in the Control M database and that you have access to. Usually access is provided based on the group to which you belong. Changes to the jobs can be done here as well, but this will not be a permanent change, the changes will affect the xurrent instance of the job. Different colours on the jobs show different status, ex: Yellow -executing, Red – Failed, Blue – Waiting for resource, Pink – Waiting for user confirmation etc
There are lot many differences, but this is the basic. Hope this helps.