quick question

American Airlines - Airline tickets and cheap flights at AA.com


GIFT - Give AAdvantage miles to your loved ones! Treat a friend or family member to the gift of travel.[SUP]1

SHARE[/SUP][SUP] - [/SUP]Did you know AAdvantage members can transfer miles between accounts? You can share miles between friends, family or colleagues to reach a flight award faster. Share your miles or ask someone with a few extra miles to share them with you.[SUP]2[/SUP]

Basically - gifting is your balance stays the same and the miles appear in family account (as if you have brought them). Share - you have already earned or bought the miles but you want to shift them to someone else account - they come out of yours and goes into theirs (and you pay for it to happen)