What's the difference between these 2 pair of Headphones?
http://www.amazon.com/Audio-Technica-ATH-M50S-Professional-Monitor-Headphones/dp/B004ZG9TMA/ref=sr_1_2?s=musical-instruments&ie=UTF8&qid=1375399545&sr=1-2&keywords=Audio-Technica+ATH-M50
and
http://www.amazon.com/Audio-Technica-ATH-M50-Professional-Monitor-Headphones/dp/B000ULAP4U/ref=sr_1_1?s=musical-instruments&ie=UTF8&qid=1375399545&sr=1-1&keywords=Audio-Technica+ATH-M50
um....The other one has an "S" and it seems to have the same specs for an extra 55$.... Why? Whats the diff?
http://www.amazon.com/Audio-Technica-ATH-M50S-Professional-Monitor-Headphones/dp/B004ZG9TMA/ref=sr_1_2?s=musical-instruments&ie=UTF8&qid=1375399545&sr=1-2&keywords=Audio-Technica+ATH-M50
and
http://www.amazon.com/Audio-Technica-ATH-M50-Professional-Monitor-Headphones/dp/B000ULAP4U/ref=sr_1_1?s=musical-instruments&ie=UTF8&qid=1375399545&sr=1-1&keywords=Audio-Technica+ATH-M50
um....The other one has an "S" and it seems to have the same specs for an extra 55$.... Why? Whats the diff?