Solution : https://service.sap.com/sap/support/notes/1376408 (SAP Service marketplace login required)
Key words : 
edit mode choose 'change authorization data', custom development management cockpit, upgrade change/impact analysis, choosing relevant push-button, choose 'user compare' button, edit mode assign, choose complete compare, user master record, generated authorization profiles, mentioned cdmc roles
Related Notes : 
       
| 1348772 | CDMC Corrections - Composite SAP Note | 
| 1244713 | Configuration of Custom Development Management Cockpit |