The grounds in New Zealand are smaller though the surfaces can sometimes be tricky to score on so England will need to adjust quickly.
Morgan was a late omission for Saturday night's match at the MCG after straining his right groin at training on Friday.
A delighted Warner, serving as captain for the match, said: "The guys from the Big Bash have been in tremendous form and are playing fearlessly".
Aaron Finch came lower down the order and remained unbeaten with a whirlwind 20 runs off just five balls as Australia romped home in style.
Chris Lynn, D'Arcy Short and Glenn Maxwell picked up the slack.
Stanlake (2-28) and Richardson (3-33) did the damage for Australia.
That is despite Australia fielding a side shorn, Warner aside, of all its Test stars ahead of the forthcoming series in South Africa. In front of 42,691 fans here, the Australian global summer was closed in style with a dominant seven-wicket win, with 33 balls to spare.
These early blows caused England to pull back on their customary aggression, but the fall of regular wickets meant this policy did not work particularly well either.
Pacemen Kane Richardson and Billy Stanlake claimed five wickets between them as Australia restricted England to 137 for seven after being sent into bat in the third tri-series Twenty20 worldwide at the Melbourne Cricket Ground on Saturday.
England now play New Zealand on February 13 in Wellington.
Opting to bowl on winning the toss, the Australians restricted England to 137/7. Australia took only 14.3 overs to reach the destination. They lost seven wickets in 20 overs and presented 137 runs milestone in front of Australia.