My opinion based upon many years spent in both cities and speaking to many interstate and international travellers. People for the most part prefer Melbourne. They love the convenience of the trams and the straight line roads. The CBD, for example, is so easy to get around.
Sydney is lovely, and the traffic is worse in Melbourne these days due to the rapid growth, but the road network it's pretty good and getting better.
Sydney has beteer beaches and winter weather though, so nice and mild!!
Also check this out:
https://www.travelweekly.com.au/article/sydney-named-worlds-10th-worst-city-in-new-rankings/
Melbourne 2nd best!
Lol sorry Sydney
Hope Zagames builds this park btw!! šš