What is the difference between Symantec Small Business Edition 12.1 and 2013

Hello all,

I suspect the answer to this question is simple but I cannot find out the difference. We're a reseller of Symantec and all ours our Symantec Endpoint Protection Small Business Edition 12.1. However we have a number of clients now where their servers are getting hammered by the onsite management product for symantec and we'd like to move that to the cloud. Apparently that is included in Symantec Endpoint Protection Small Business Edition 2013 but the one we bought yesterday was Symantec Endpoint Protection Small Business Edition 12.1

What am I missing here!? Are these two seperate editions? Can I use the cloud portal for management on a 12.1 Small Business license?