A:Answer They are noticeably smaller, for starters. This is the first pair of in-ear Bose headphones that don’t stick OUT. The quality of the sound is quite nice—depth, hi-lo range, and yes, good, crisp bass too. Lastly, and for me, most critical—they fit snugly in both ears and don’t feel like they’re ‘just about’ to fall out. It’s definitely worth experimenting with the supplied wings and silicon gel buds. The matching Bose app (iOS and Android) will help you figure out which ones fit just right. I own earbuds from Jabra, Sony, Apple, and these are my new favorites.