Corum lags like ***** with a hernia when your in town. But, when your in dungeons an whats not theres like non at all :P. Flyff is still funner.
and scions of fate isnt an exact replica. Sof is a martial arts fantasy while flyff is like cute-medieval. flyff has more customization, you can fly in flyff (:P) all the mobs in flyff arent aggro( >_>), and more people play flyff and some more stuff that I dont feel like saying. So imho, flyff is better.