While both players arrived at Bayern's headquarters to finalise their moves on Friday, they faced contrasting paths in their respective bids to join the 2009/10 German Bundesliga champions.
Usami, who joins on a year-long loan with an option for a permanent move, was not hindered in any way by parent club Gamba Osaka, who were more than willing to give the nineteen-year-old their blessing.
In stark contrast, Manchester City constantly played hard ball with Bayern during negotiations, although Thursday's confirmation of the deal saw an end to the lenghty discussions.
Nonetheless, both players were keen to express their happiness at joining a club of Bayern's stature, especially Boateng who was thankful the Bavarian outfit did not lose their patience with City.
"I'm just delighted the wrangling's finally over," Boateng said on Bayern's official website.
"Despite the difficult negotiations, I'm delighted the club never caved in and kept fighting to get me."
Meanwhile, Usami, who ran into current club icon Bastian Schweinsteiger whilst being given a tour, described his move to Bayern as the realisation of a dream.
"Coming here is a dream come true.
"FC Bayern is a huge club with great players.
"I'm delighted to be here."
Boateng is already an established German international, and starred for Joachim Low's men at the last World Cup, where they finished third.
In contrast, Usami is relatively unknown but has already been compared to Bayern stars Franck Ribery and Arjen Robben.
Boateng will wear the number seventeen jersey in his first season at the club, while Usami has been handed number fourteen.