Beagle's benefits over eg. Tracker

[Ethan Osten <senoki gmail com>]

Hi.

I'm currently about to write an application using a search technology
like Beagle or Tracker (only the file search parts) and I'm not sure
which to choose for the task, as both should be broadly suitable.
Tracker currently (and importantly) has tagging, which Beagle (as yet)
does not. Are there plans to integrate Leaftag or some other solution in
the near future?

Beyond that, I'm wondering "what are the palpable benefits for using
Beagle, especially given the apparent intention of the Tracker guys to
propose Tracker for GNOME 2.18?" The latter point is particularly
important, as I don't want to spend the time to use Beagle only to find
that Tracker is going to win out.

Thanks for anything you can tell me.