Three bonuses to be precise, all of which come with a load of prerequisites. Still, it's nice to see Square throwing a bone to those who happen to participate in both of their online games. Players who decide to link the accounts, get the following neat perks.
Bonus 1: The FINAL FANTASY XI monthly subscription fee will be discounted from â‚¬12.95 to â‚¬7.00 and £8.99 to £5.00 per month on FINAL FANTASY XI accounts linked to the same Square Enix Account as FINAL FANTASY XIV.
Bonus 2: FINAL FANTASY XIV players with an active FINAL FANTASY XI account will begin their adventure with a special in-game item: Hermes' Shoes. "Named after an elder god, all but forgotten in the modern age, these gold-tipped shoes have been crafted with the lightest of leather, making them optimal for use by heralds and noterunners."
Bonus 3: When creating a new playable character on a FINAL FANTASY XIV account, a character name used from the linked FINAL FANTASY XI account can be transferred to FINAL FANTASY XIV.
It's neat stuff, certainly worth considering although there are a lot of rules attached. Naturally the perks don't apply to trial accounts, and Final Fantasy XIV accounts must stay active for the bonuses to persist. No doubt Square Enix will be releasing a similar announcement to North America soon, as fans are eagerly awaiting more news.
Source: Final Fantasy XI Japanese Site