I owned the Elite 65t prior to buying these (on those, the battery life deteriorated severely, and the left bud developed issues after 2 years) and was a bit worried these wouldn't have the same features (sound quality, battery life etc) as the 't' models. My doubts were completely dismissed after using these Elite 4 Actives! Better sound quality than the 65t, in part due to the active noise cancellation, they are smaller and lighter, and the bud cn be used independently of each other. The only drawback for me was they aren't able to be connected to two output devices at the same time, but this isn't a big issue. Definitely happy to have the Elite 4 Active.