Tor browser bundle: Is it the most secure?

SonnyJim writes: I frequently use Tor for my anonymous browsing needs, via the Tor Firefox bundle for Windows. I noticed that there are many other applications out there that use Tor as a proxy as well (Janus VM, ChrisPC, etc.) Are any of them more secure than the original Tor bundles, or am I just wasting my time trying these other applications? Is there anything more secure than Tor, as far as anonymous browsing goes?