SSSNT relates to our CISCO SOLUTION SUPPORT SERVICES. With Solution Support Cisco offers solution expertise and accountability for centralized issue management and resolution across our products and those of our solution partners in your Cisco environment. Very simply we offer to take first call and work with the other manufactures to resolve an issues, that is part of the overall solution the Cisco environment is part of, even if that issue may not be seem to be a Cisco issue. Please take a look at the Cisco.com page https://www.cisco.com/c/en/us/services/technical/solution-support.html for some more detail.
SNT is our Smart Net Total Care service. Smart Net Total Care is our award winning Technical Support service that will help you solve problems faster, improve efficiency, and help keep the network up and running. You can read more here: https://www.cisco.com/c/en/us/services/technical/smart-net-total-care.html
If you want Cisco to work with your other solution providers then Solution Support is for you. If you want Cisco to help you support just the Cisco equipment than Smart Net Total Care is what you need. Your Cisco partner will be able to explain the details to you and discuss the best maintenance service for your network.
This is a general definition of the two services. I want your opinion on what is the best solution in terms of features, support, and speed of response
