According to this news source, Manchester City are really interested in Dortmund's great striker Erling Haaland. However, they are not willing to spend too much to sign him. Maybe the reason why they made a statement like this (if it's not a rumour) could be that they are thinking of signing Harry Kane at the first occasion. Harry Kane is unhappy at Tottenham now and he wants to leave the team as soon as possible. And he would cost less than Haaland to City I guess. 
https://www.manchestereveningnews.co.uk/sport/football/transfer-news/haaland-man-city-transfer-news-22473845
Until now there has been a lot of speculation about this talented young player and indeed the most widely reported at this time are City and Madrid which are indeed at the peak of speculation about Haaland's future.https://www.manchestereveningnews.co.uk/sport/football/transfer-news/haaland-man-city-transfer-news-22473845
This is actually very risky, Haaland is still very young and he has to choose the right team if he really wants to change clubs because if he doesn't, his performance can be dimmed because there are so many young players like that and dim in a new club.
I think if you really want to be more competitive the EPL is better, but if you want to be comfortable getting the league title I think now Madrid is more promising