ummm, no.
http://pickingpros.com/nfl/2007/san-francisco-49ers-roster.php
no Aldon Smith, no Ahmad Brooks, no Navarro Bowman, no Donte Whitner, no Michael Crabtree, No Justin Smith, no Kendall Hunter, no Colin Kaepernick, no Mike Iupati, no Carlos Rogers, no LaMichael James, no Anquan Boldin, and more.
That's more than half of a starting defense, a return specialist, different targets in the secondary, an entirely new Quarterback which makes all the difference and changes your entire philosophy on Offense when they are as different as Smith and Kaepernick are...Jim Harbaugh did not go to 3 NFCCG's with "practically the same team Hostler had;" not even close.