wos asking my self the same question since i had a x360 slim 2 years ago so i kinda searched the diff and found out that the E is the same as S even uses the same ventilator so the plane lifting sound should be still there, also almost all parts on the E are from the slim. the main difference is that its a little bit smaller, has buttons for turn on/off and eject cd not like the slim that has a touch button and is more looking like a xbox one ... oh yeah also you only have hdmi so if you have a older tv or planing to use it on a older tv i suggest you buy the slim ... but the prices are the same i think so pick one up. im going for the slim as sometimes i take it to my friends and not all have new age tv