If your days are packed with transitions—commutes, flights, meetings—draw-activated hardware will likely serve you better. It's the kind of device that gets out of your way. But if you're someone who likes to tinker with temperature and appreciate a more deliberate session, button-activated gives you that control.

Think about where you use it most: standing in line, walking between buildings, or sitting still at a desk. That'll tell you more than any spec sheet.