I wish I could be of help, but I haven't used either. If you read through some of the threads at this forum, or find some by making use of the search function at the top of the page, most will say there is no such thing as "best".
A lot depends upon what your expectations are from the two. If you feel your security software is going to protect you no matter "where you go" or "what you do or", then neither will do. If you realize the level of security is ALWAYS going to be dictated by you, then either will do. In other words, adopting safe computing habits is of the utmost importance. First and foremost.
Since both are free, you have the luxury of installing each (separately) and trying them out. You can be then be the judge, of which one you feel is the "best".
Best of luck..
I have a dell gx260 Optiplex 1gb RAM computer,with XP O/S.
Which totally free Security system is best,all-around, Mocrosoft Security Essentials, or Spyware Terminator(anti-malware/trojans/rootkits/worms etc, with clam anti-virus), OR Microsoft Security Essentials.
I am a Novice with computers. Thanks, Chris-Hull.