GTKYahoo is a GTK+ based Yahoo! Pager client. It is functional enough to let you log using your primary profile, and load in your alternate identities and buddy lists. It is usable enough for carrying on conversations with friends and keeping your current status (here/away/busy/etc.) up to date. It can also receive calendar reminders from Yahoo Calendar and notify you when you have new Yahoo mail. It includes a few features not available in the windows version, such as an answering machine and automatic forwarding of incoming messages via email.
Individual vs. systemwide use?
That is a VERY important characteristic of your installation that is not reflected in these tests. Which of these engines is most suitable for an 'all users' installation, as opposed to an individual user having their own bayes DB's, and own finely tuned filtering.