The PXC 550 will lose some of it seal as well, but not nearly as much. we all know them by sight. HOWEVER: I do not recommend using the provided "nail-free auxiliary sticker" that youre supposed to put on for 48-72 hours after gluing it on. Purchased for my elderly Dad and even though the style is different than he was used to (Fruit of the Looms have gotten so thin and cheaply made, they fall apart quickly), he approves . I think either one is a good option. I have size 9. I like pretty, and comfortable, shoes, but value having the right type of gear for a situation. These will not wear out. I have only found 1 set of earbuds that Ever were comfortable. I am hoping if I dont reinjure it by wearing other shoes, I can eventually not have this problem and wear all those expensive shoes I bought to combat this problem, that did almost nothing.