P0 · CATALOG
vs KaraFun Pro
Their ~$49.99/mo catalog rental vs your library, the Fairness Engine, and LAN. Different jobs.
P1 · BYO WINDOWS
vs Siglos Karaoke Professional
$119 perpetual Windows peer vs Free version / Full version ~$10 / 60-day trial. Same folders, different Fairness Engine bet.
P0 · FOSS
OpenKJ alternative
$5 songbook if you stay. 60-day Full version trial if you want the Fairness Engine. Community fork still maintained.