SEPM 12 Default Policy Differences

We are currently working our way through upgrading from SEP11 to 12 and are bringing an SEPM12 server on line.

One question though that I can't find an answer for on here.

After installation it has 2 default policy groups... "High Security" and "High Performance"

Can anyone tell me what the differences are between these policies from install, as from looking at the managment GUI I cannot find any discernable differences between them. All the settings look to be identical.

I appreciate any guidance here. If there are clear differences then I'd also like to understand the performance impact of using the high security option vs the perfomance option from the client machine perspective.

regards

Rob