On Wed, 8 Dec 2010 21:02:53 -0800 (PST), Matt
wrote:

Also Orion's service module is far bigger than Dragon's, and
an Orion spacecraft as a whole is twice as massive as a Dragon is
given the Orion is intended to support manned deep space missions from
the get-go.

The original Orion was intended to do that. Isn't the compromised,
stripped-down one forced by Ares I limitations a great deal less
capable?

No, it went from six to four crew for ISS missions (it never needed
six anyway with Soyuz ever-present) and abandoned land recovery, but
it is still Beyond LEO capable.

Brian