What features are you using?  I don't use a suite.  I use seperate apps for viii, firewall, and spyware.  I would want to report apples to apples.
Also, it depends if you updates are a priority.  My app may update faster (more often) than yours.  The other thing is my seperate apps may use more resources at specific times, like when I am doing an update or a scan opposed to just sitting there waiting for action.