Oh and @SightUp, I'd say 0706 is "better" (depending on what you consider better, of course) b/c it addresses stability issues supposedly... 0902 simply address compatibility issues.
Also keep in mind the X-Fi utility adds overhead and uses memory, including startup items. There is one constantly running service that uses more memory than AV software. Having used both the X-Fi software (on the GENE-Z) and an actual X-Fi Titanium...