Smartbands are typically for fitness purpose, to track your exercise activity. Sony smartband doesn't have any display to show the incoming email or called id or anything like that. Sony Smartwatch 2 is like an extension to your phone where you can read txt msg, email, calendar reminder, control music on your phone, etc. and see who is calling you, among a lot of other stuff (they have their own little apps you can load). Both Sony smartband and SW2 need to be tethered to your Phone through bluetooth. But totally different animals!