Please see below.

https://support.na.square-enix.com/f...&c=2&sc=0&so=0

From what I hear, Asura is good if you like a server active with a lot of people, high competition. However, that does have its drawbacks, including groups demanding top gear for pick-up groups, a large amount of 'mercenary services', and the number of bots is said to be high on Asura.