The iPhone (left) and Motorola Droid (right) both display calendars graphically, with event information legible in the day view. Both devices give more detailed information when an event is clicked. The Droid puts your Exchange calendar in a separate app than Google Apps and other calendars, so you can't view your work and personal calendars in one place. For non-Exchange calendars, the Droid lets you see any combination of calendars at the same time; the iPhone lets you see either all calendars or just a specific calendar.
Neither the iPhone nor the Droid let you change which calendar an existing event is assigned to, and neither device can open .ics calendar invitation files. The iPhone lets you respond to Exchange's calendar invitations; the Droid does not. The iPhone's list view for calendars is a compact display method the Droid lacks.
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