Contacts and calendars. Both the iPad 2 and the TouchPad offer three of the same calendar views: day, week, and month. But only the iPad 2 supports the list (agenda) view. Moving among months is easy on both, and the two devices can display multiple calendars simultaneously. It's slightly easier to move among adjacent weeks and months on the TouchPad, as you can simply scroll. The iPad 2 makes you select the specific week or month from a horizontal list, which is less efficient for checking the adjacent week or month, but faster for going to a specific week or month than the TouchPad's Jump To dialog box. Call it a tie. But the TouchPad has more flexible options for setting recurring events; for example, you can set an appointment for every x days or every month on the first Monday -- neither of which the iPad 2 supports.
Both the TouchPad and the iPad 2 can send invitations to others as you add appointments. On the iPad 2, your invitations for Exchange accounts show up in your calendar as a pop-up; you can accept them there within the full context of your other appointments. For both Exchange and other email accounts, you can open the .ics invitation files in Mail, then add them to the calendar of your choice. On the TouchPad, the Calendar app automatically adds Exchange invitations to your calendar, as well as any invitations set up in Google calendar if you use that. But you can't open .ics invitations sent to POP or IMAP accounts, as you can on the iPad 2.
Both the iPad 2 and the TouchPad have Contacts apps, but navigating through entries on the iPad is easier. You can jump to names by tapping a letter, such as "t," to get to people whose last names begin with "t," or search quickly for someone in the Search field by typing part of the name. The TouchPad has no way to quickly scroll; you'll have to use the Search box to jump to contacts.
Searching is easy on the TouchPad, as the Search box is always visible in the Contacts app. On the iPad 2, to search your contacts, drag up above the first contact to reveal the Search box. On the TouchPad, you can also designate users as favorites by tapping the star icon button in a profile, to put them in a shorter Favorites list. The iPad 2 doesn't have a similar capability.