I was searching and found a list of the 2011 models with their Geekbench scores.
http://www.primatelabs.ca/blog/
EDIT: Also found this small handbrake comparison
http://mobilityupdate.com/apple/imac-2011-vs-2010/
http://www.primatelabs.ca/blog/
EDIT: Also found this small handbrake comparison
http://mobilityupdate.com/apple/imac-2011-vs-2010/