The Bose have larger ear cups that tend to feel more secure, although they also tend to make me feel a little sweaty in warm weather. We ordered the 7. I have many different style pajamas and this is probably the style I wear most. Socken ausziehen und Schuh auf guten Sitz prüfen. My biggest issue is the sizing is way off. I was surprised at the sound quality. Extreamly practical, specially for exercise. Using to hang tools in the garage. This is an absolute beast of a machine. I wish they had more size five so I could get a couple more for work.