which is better between Beagle, Google Desktop, and Spotlight?

["Tshepang Lekhonkhobe" <tshepang@gmail.com>]

Hi,

I hear good things about Spotlight and hardly ever used Google Desktop
and Beagle, so out of curiosity do wonder about how they compare with
each other in terms of memory usage, indexing speed, and breadth of
search.

Also watch out for Tracker (www.tracker-project.org) which might soon
rule over all of them.

thanks