They both took part in a debate at the closure of Vienna Days in Ljubljana on Wednesday.

Janković stressed that Ljubljana was deeply honoured by the comparison to Vienna, which has been at the top of Mercer's quality of life rankings for years. According to him, Ljubljana wants to make it to the top ten.

The debate then turned to the financing of the two cities, with both Janković and Brauner agreeing that capitals should get more money from the state. According to Brauner, cities are tasked with taking care of children, young people, for education and integration, which is why the should get more money.

Janković moreover pointed out that Ljubljana and Vienna were both open cities, open to accepting new citizens. Vienna Mayor Michael Häupl stressed years ago that Vienna required 40,000 new citizens every year if it wanted to develop. "[Vienna] can be a role model to everyone," Janković added.

Other topics during the debate were non-profit flats, with Janković stressing that Ljubljana would build 2,000 of them if legislation changes, and challenges the cities will face in the future.

According to estimates, Vienna will have two million citizens in 2020, which will be a huge challenge for its infrastructure. "We don't have such revenues as we used to, which is why I believe investments should be launched throughout Europe to fight unemployment," stressed Brauner.

The pair headed to Town Hall after the debate to cut the largest Sachertorte in the world as the Vienna Days in Ljubljana draw to a close.