If you live in a rainy environment, the IPX8 rating on the Isports may be appealing. I got a 10 and wear a 9 and they fit one size smaller. Bud XR700 is another story. If you have either flat feet or high arches, you need a slipper with extra support. My husband love these headphones. And these are rechargeable. So this is great when she want to use her ipod or ipad when we are in the car and im blasting my music from the car she can listen to her music through her music hat. I had a double mastectomy and found that I could flip the head set over so the heavy part was in the back and that took the weight off of my ears. So I ordered 8s and they fit ok. Missing hardware, was listed as a “Like New”, it was not repacked well; sent it back.