AK has some great attractions, but your dd is probably too young for dinosaur ride or EE. So, you are really only looking at KS, Nemo Show, and Festival of Lion King. AK also closes earlier than other parks.
DHS has RNRC & TOT, which are too big for your dd, but they have more stuff that she could do - Playhouse Disney, Ariel show, Belle Show, TSM, Star Tours, Muppets, etc.
Even though I like AK better earlier, if I am going to have a short park day, I would make that AK and save DHS when I can be in that park all day. Warning - I am part of commando group that does wear underwear, but we go RD to Park Close. I did let my girls have naps that age, but it was difficult.
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The funny things is my DD and I have watched videos on ToT and she wants to go on it so bad (which she is above the height req.) and Ive warned her she might pee her pants, but she still wants to ride it, she may change her mind once she sees it in person (but im still bringing a change of clothes just in case.