If i were Harry Kane, i would choose Bayern Munich; great team, great fit; and a beautiful culture there in Germany. What will Harry Kane do?
If i were Harry Kane I'd force a move to Manchester United, hell, no way i would leave England for Germany when i am just 47 goals short of becoming the all time highest goal scorer in the Premier League. I'm pretty sure Harry Kane would be thinking this way, i know trophies are very important, but breaking that record and creating history is also unbelievable. If Manchester United are fully interested in Harry Kane, then i think he should move there and stay in England, he'll be able to win trophies in United and will also break the record after two seasons or so; it is a win-win for him.
If Harry Kane wants to win the Champions League title, he will probably choose the Bayern Munich team. Because Bayern Munich can dominate more than Manchester United in the Champions League. However, Manchester United is a strong enough team. Bayern Munich and United are not weak teams. But first Harry Kane should be without Tottenham. However, since Harry Kane has played in the Premier League for a long time, Harry Kane could probably adapt quickly to any Premier League team.