أنشئ حسابًا أو سجّل الدخول للانضمام إلى مجتمعك المهني.
Both statements are not really accurate. Change management is the process of managing change or in other words it is essentially project management to implemement any sort of change within the organisation.
Management change is simply changes in people within management which may or may not lead to a major change within the organisation.
I think that "change management lead to management change" is more accurate.