NIS for netbook question

I currently use NIS 2010 for my desktop  but I also own a netbook. I was wondering I should put NIS 2010 on my netbook or get the netbook edition. will the level of security be the same with either version or will NIS 2010 bog down the netbooks performance? I have heard Microsoft Security Essentials can do a great job as well. 

 

Any advice would be great.

Thank you