Yeah, the changes are minor physical improvements. Seem good but not game-changing. Fiio and Shanling have adapters that are in the same market segment, but I don't know offhand if they do wired. Fiio Q5 sereis does for sure but is over budget. The big question mark is the upcoming Qudelix 5K from the ES100's designer -- if your budget is limited and you have some patience, I would wait to see how that reviews before deciding between that, the ES100, or something else. (Personally, the biggest advantge of the ES100 and potentially the 5K is a good EQ that can even be controlled wirelessly from a phone even while it's being used wired to a PC.) One question to bear in mind re: the dongles generally, is: do you want something for use wired, while it's in your pocket? And if so, will the device and your phone's connection be able to hold up to the stresses that may be placed on them during pocket use, and also, will the phone+dongle combination be comfortable to carry in a pocket. How music do you listen to in higher bitrates, and do you believe theres an audible difference? This would be the main determining factor.