Level of protection with v21.6

I guess the real question we should be asking about upgrading to v22 and using our old keys is this.... Does v21.6 give you the same level of protection as v22? If the only difference is the interface and the ability to use it on 5 devices, then this may be a moot problem. BUT, and this is a very qualified BUT... does v22 provide any additional protection that is not in v21.6? If there is new and better protection, then what Norton is doing borders on being criminal by not providing the protection we all paid for and expect. If they've upgraded NIS v21.6 to work the same as v22, then I'm fine with waiting until my current 187 days goes by before buying a new key. 

 I don't want to know that I can continue to use v21.6 and be safe. I want to know if v22 provides MORE and/or BETTER protection. What is the answer to this????