This a player that was signed by Xabi Alonso and Xabi will want to see him achieving the best of the best. The German league is also a league to see the younger and finest talented players grow I to who they want to be it is not as challenging as the Premier League not too competitive.
I will not advice comparing the both players. Kane is another player who has developed through the Premier League he is at a higher level than Boniface. All he is after is to win trophies and score goals for Munich. Boniface will want to payback and help Alonso win games he is in the right hands ahead of the African tournament they will play.