Renew subscription or purchase new version

Hello,

Does the new Norton Internet Security currently being offered for sale have any upgrades or improvements over the current version?  Reason I am asking is that I need to renew my subscription and I want to make sure I get the most updated version.  If there are big changes then I am going to order the new version but if there aren't then I will just renew my subscription.

 

Also, If I do order the new version will I have to reinstall it on my computer?  Does that mean I will have to remover the old version?

 

Thanks.