The main difference is that 2 KHz is a bit recessed relatively on the PRO model, and 6 KHz is a little more prominent. So simple in design, but for some reason, I and my handyman had a problem putting it together. If youre looking for something fancy and nice looking to impress your friends, these will not. Only the right pod came on (sound was good, nothing spectacular but not that cheap tinge sound you get sometimes. It?s beautiful. However I washed and dried it (there are no fabric tags or care instructions) and it shrunk a good inch or two in length. She is now hearing sounds she normally would miss, but after an hour or so wearing the headset, she complains that her ears are getting sore. I have to changed because the size is too small This seemed to be the best option for us and the initial impression is that this is solid, looks nice, and what we wanted. It even charges with my thick case on it (I was worried I would have to take the case off every time.