Give orders:
..may spend an action and give orders to any friendly, inactivated unit, with at least one model within the individual model's command distance... giving orders ends a model's turn.
Commander: unit
..can use an action to activate a friendly squad of similar type, so long as that squad's leader is within the model's command distance..
So they are not the same. Give orders requires to be close to at least one model, commander requires to be close to squad's leader. Give orders ends model's turn, Commander doesn't.
Is this correct?