Ok, that explains your question. Thanks
I have both the N7 and the K2 processors, I am bilateral.
I tend to wear the K2 processors during the warm months and the N7 processors in cooler months.
The N7 has a lower profile on my head and winter hats and caps fit much better. The N7 processors are less tolerant to sweat and the microphones get blocked. The N7 processors are more secure on my head overall.
The K2 processors are nice because they are not on my ears and I like that. I can sweat profusely and the processor microphones do not get blocked. The K2 processors are less secure on my head, they are more likely to get grabbed by a tree limb or other obstacles that can pull them off my head.
Sound quality is identical between the K2 and N7 processors.
The K2 processors have a better Bluetooth connection in my opinion. It is more reliable. I use android phones. Another example is using the TV connector. I can get much further away from the TV and still hear it clearly with the K2 processors.