Momentum 2
+ better, more transparent tones

Bose
+ Better suppression
+ Larger ear cups, better wearing comfort

I chose the Momentum because the sound is clearly better and the rejection is not as bad as with the Bose. I just had to make concessions in terms of comfort.

I like the sound better and the workmanship seems much better. The Bose are simple plastic things. However, noise cancellation is better with the Bose, but that doesn't spoil my enjoyment of the Momentum 2 because they suppress enough for everyday office use. For flying, the Bose would probably be better.