Dhoni, nursing a palm injury, was meant to take over from the second Test onwards, originally scheduled here from December 12.
But due to the rescheduling of the start of the series from December 4 (Brisbane) to December 9 (Adelaide), the regular captain could make the playing XI from the very beginning.
"Both are aggressive captains. But there is a certain difference. Virat is a lot more charged up on the field. It is enjoyable playing under both of them. It might be a longer wait for Virat to lead India in Test cricket since Dhoni is here now," Dhawan said.
The focus is slowly shifting back to cricket after a week of emotional turmoil owing to Hughes' death and Dhawan said he is looking forward to the challenge of facing Mitchell Johnson's pace in the series.
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"I feel it is important to have an aggressive opening batsman. Not in Australia, but in today's cricket in general. It helps turn things around quickly for your team and helps gain momentum. I would love to play that role for my side and it will be very good for us if I can pull it off," he added.
He did well in New Zealand, but failed to impress in South Africa and England against better quality attacks. On that latter tour, he was also dropped after the third Test in favour of Gautam Gambhir.