Smart Securit and AV ..?

I'm quite confused about the ESET products, Smart Security 4 and Anti virus 4.

What's the difference?

Does ESET Smart Security have all of the Anti viruses' features? Basically, what I'm asking is if Smart Security is just an upgrade from Anti virus.

Any help would be appreciated.

 

Smart Security

• Antivirus
• Antispyware
• Antispam
• Firewall

while Antivirus

• Antivirus
• Antispyware

so Eset security has all the features of the AV + 2 more features

 

ESET Smart Security = ESET NOD32 Antivirus (also includes SysInspector and SysRescue) + Firewall + Antispam

So if you are using a third-party firewall (e.g. Online Amor or Outpost) or you don't want a third-party firewall and you are very happy with the Windows Firewall (quite likely when you are using Windows 7, quite unlikely when you are using Windows XP). And you are using web-based e-mail (e.g. Windows Live, Gmail), which means the Antispam won't work (they both include Antispam anyway).
You won't need an upgrade to Smart Security.