How does energy released in combustion differ from energy released in aerobic respiration?
The difference is in the way this energy is released, and the fate of this energy.
In combustion, all the energy is released at once so it is turned into another form , mostly heat, and dissipated to the surrounding.
In aerobic respiration this energy is released in a step wise manner,and stored in ATP molecules. This ensures that it not dissipated and lost, and it is used by the cell without causing any harm , for example overheating, to the cell.