If you have hoppers I would suggest both.... Out of all our visits, we've never missed a park,ever.
It's hard to say for your family, because both have plenty of stuff/ shows to see.
AK.: BESIDES some good rides, it has conservation station, which ties in with train ride.
It also has birds flights of wonder, Nemo, lion king, tough to be a bug too. Has a bunch of other stuff as well.
HS.: Also has somerides like TSM, Star tours, great movie ride, but also the shows as well. Beauty n the beast, Indiana Jones, Play house Disney, The little mermaid,Lights motor action, Muppets 3d and also their playground. Obviously Fantasmic at night too.
As I state both are great but if you try could only do 1 , then I'd choose HS.