Comfort: I favor the S600 because the ear loops allow them to sit snug without causing pressure. Only regret. It also snapped into place when I attached it to the top of my AirPod case. I ordered the large and it fits as expected. I wouldnt recommend these to someone with a wide foot. I also help out at a mechanic shop and the garage dirt/greesy residue is a pain to get off shoes but not these! These headphones allow my daughter to use her new Xbox 1 to converse with her "teammates" without me having to listen to them all. Además, le quedó un tanto grande a mi barra, por lo que se está moviendo a cada rato. That was my only complaint however, as the sound and comfort were top notch. I found them in a boutique store for MSRP price and just couldn?t bring myself to pay full price for them.