Google Web Accelerator vs. FastCache?

Chris Pirillo extolled the virtues of AnalogX's FastCache on a podcast of his show recently, noting how it increments browsing time saved due to caching, which you can check on to see how much aggregate time you've spent bringing to mind the oft-criticized Google Web Accelerator.

I initially downloaded GWA and uninstalled it, not finding it to be too dramatic and having concerns with security issues. The one thing I did like about it was that the program apparently set and drew from a universal cache that worked across all installed browsers on a machine (or at least with IE and Firefox). So regardless of platform, the cache worked.

Both evidently act as DNS proxies, storing content locally longer than a browser normally would. So in cases of pages/sites accessed subsequently, they're pulled from a local cache rather than making a DNS query.

I bring this up because I'd like to use either/or to boost performance, but don't know which is better. And being a web developer, a lot of utilities I write are web-based, so I don't want JavaScript confirmation dialog windows ignored or forms pre-submit just to shave 800 milliseconds off my loading time. Chris gave a good sermon on FastCache, but GWA looks good, too.

Anyone got any hints?