Is NIS a true and complete replacement for PCTools Spyware Doctor?

I have recently received notification that Spyware Doctor is being retired and I am recommended to move to Norton Internet Security.

 

My problem is that I already use NIS but I also use Spyware Doctor to dig out things that NIS does not pick up. Does anyone know if all of the capabilities of Spyware Doctor are now going to be included in NIS?