I believe as long as the DB is in excess of what it was, you can get the
restore to run...
(back with ADSM 2.x that wasn't the case but I believe it might be now, we
always have specs on our DB's)

This is why it is nice to have some automated task to do something simple
like mail you the characteristics of the DB daily or weekly...

Everyone should take time to attempt a restore of their db on a test box, it
is an educational experience and will save time and headaches later!

Dwight