Board Thread:Questions and Answers/@comment-188.79.230.66-20130925193902/@comment-193.173.106.62-20141205143744

in the translated Light novels, both dexterity and agility are used for the same stat. A player can only choose STR or AGI when levelling up.

However, if you read carefully, other stats are mentioned that are hidden or boosted only by items. This include Vitality and Luck. There might be others, if you consider GGO which showed six stats. As all Seed games can import characters from eachother, its like the stats are the same, but how they are used are different.

For example, SAO hides most of them, GGO shows them, ALO only allows you to boost them through items/magic buffs. SAO has higher increase in hitpoints when levelling up, so its likely your Vitality levels up automatically when you level up in SAO. (SAO characters that are imported into ALO have a higher base hitpoints then original ALO characters. Asuna had more hitpoints then Yuuki in their duel for example in LN, cause Asuna was imported from SAO. Her original ALO character Erika would have lower hp then)