So, BioWare kinda worked it both ways...they made it the same in some instances, then referenced the Pen and Paper differences...but there was that instant in ToB where Aerie has a dream of her and the main PC growing old together...and I thought "Wait a minute...I'm human...she will still be young when I'm cold in the ground barring some strong magicks..."
Yea, that was what I was referring to for the most part. Elves usually live to be 280+ years while human pcs don't live much longer than maybe 100 if you're lucky. (or if you have a chance to become a chosen of a god like Elminster and live for about a thousand years )
It would be hard to fully consider it though, no one really knows how old Viconia, Aerie, or Jaheira is. In most of the ending story lines in ToB, they say that the Pc and the elven lover live and die -together- (or grow old together, you get the idea). I think in the BG series they treat elven years the same as human years.