Yes Australia are way better team than Sri Lanka in this shortest format of the game,and we have seen in the first t20 that what they can really do.
Maxwell is back in form and he is a dangerous batsman with Warner as well and Starc in the bowling department,Australia looking clear favorites to win this match.
Maxwell is very dangerous batsman and he got into his good form than that really good sign for Australia, Sri Lankan batsmen are not into good form and looking under pressure in shorter form of cricket, that is why I am also pretty sure Australia will play with more positive approach and try to make whitewash.