The ear-cups are far more comfortable. I was a bit disappointed with the overall look of these sandals. La base di ricarica è piccola e rigida, aspetto che permette di tenerla in tasca o in borsa senza doverci prestare particolare attenzione. The IE40 Pro are also smaller in the ear that is easier to fit and more comfortable. Assembly was a breeze, and consisted of simply tightening washers and screws with an included allen wrench. They definitely do run big because a 6-12 month old could not wear these shoes. Smart design idea there. 5 so I ordered the 11 and they fit perfectly. And ADJUSTABLE! I know she wont wear them as long as a larger size, but its more important to me that they fit.