Hi there,
I have used both McAfee and ESET in the past and can honestly tell you that I think ESET has always been better and higher up in terms of providing good, lightweight security for the end user (this is not aimed at just McAfee, but a majority of the Antivirus products out there). However, other people may have experienced it differently. Not only this, however everyone has a favourite Antivirus (or some do

).
Looking at reviews for both products I can see that ESET is a overall winner. In fact, you can also see on the Malware Hub they are either top or second, every time... Usually.
You can also configure ESET for better protection than what it provides by default. I'm sure
@Malware Test could help you with this if necessary.
Hope I helped,
Thanks.