Hi Matt,

Well is pretty much the same, a couple of new features:

Features in Software Version 8.20

The following new features are supported in software version 8.20.

•Slow starting services through the least connection (leastconn) load-balancing method - Cisco Content Services Switch Content Load-Balancing Configuration Guide

•Using SFTP to copy files to the CSS including log files, running and startup configurations, profiles, scripts, and core dumps - Cisco Content Services Switch Content Administration Guide

You can find the 8.20 release notes here

http://www.cisco.com/en/US/docs/app_ntwk_services/data_center_app_services/css11500series/v8.20/release/note/RN820_X.html#wp171185

Hope it helps!!

Diego M