OutClock is directly synchronized with Outlook. So you don’t need, as with CalendarClock, to export your events manually. When you add or remove an event in Outlook, you just have to tell OutClock to update itself. Outlook does not need to be open for OutClock to work.
You can, as in CalendarClock, customize display attributes (color, fade, overlap, .) for each event category. You can also tell Outlook which events you don’t want to be displayed in OutClock.