He told every blub that he wasn't interested - he only wanted Barcelona.
I don't rate any city. His girlfriend who is in to fashion does, the media reported that she was a admire of London because it would be a good city for her and her carrier. When it comes to Liverpool, fashion there and fashion in Manchester is the same, but right now Liverpool as a football club is more attractive for every player in the way that they are fighting in all cups and the league while we have not even been close (expect the Europe League final we lost against Villareal) and for a player that is 26 years old next summer, he will probably choose a club were he finds it most realistic to win titles - not saying things can't change in 1 year. We might improve a lot this year, maybe sign 1 more big player this summer and keep adding world class players next while Liverpool might struggle to replace some of their guys and players like Virgil, Salah, Henderson, Firmino gets older and wont be easy to replace. But as of right now, they are more likely to win the PL/CL then us. Next move (either if he signs a new contract with Barcelona or decides to move) will be his last big move since he will be 26 and probably sign a 5-6 year contract.
So, to clarify my point. Its not about the cities, its about the whole picture. In media they reported that De Jong wants a project that suits both him as a footballer and his girlfriend for her carrier in fashions. So its not hard to make the assumption that he would like to live in a city where he can play for a club that can pay him good money and be able to win title and at the same time satisfy his family. In that case, right now, clubs like Barcelona, Real Madrid, Bayern, Chelsea, Liverpool, City can offer either one or both things while we cant promise either of it. If he was sure we could, he would have signed already. I just cant see a reason why he would all suddenly find us as his next club if don't improve drastically. Which I hope we do.
Signing players like Casemiro, Antony - even Martinez and Malacia - will improve our chances, but we need also to make players like Sancho, Rashford, Varane, Martial to step up and maybe add 2-3 more players of the highest level to be able to fight City and Liverpool for the PL title and be in the CL every year. That will help us get the players we want, not only De Jong.