Difference between iCalendar (.ics) and the vCalendar (.vcs)

Question

I want to send booking information through mail in an attachment to add in MS Outlook. Which format is better? Especially for MS Outlook 2003?

Answer 1

The newer iCalendar format, with more data attached, includes information about the person who created the event, so that when it is imported into Outlook (for example), changes to that event are communicated via email to the creator. This can be helpful when you need to inform others of any changes.

However, when I am just exporting an event from one of my calendars to another, I prefer to use vCalendar, since this does not require sending an email message to the creator (usually myself) if I make a change or delete something.