I have stayed at both resorts
Coronado - water view room
AKL - Jambo House 1bdrm villa
I favor Animak Kingdom (in the summer) for a few reasons...
1 - their pool/spalsh area you have access to 2 wonderfully themed pools, we only do 1/2 day park and 1/2 day swim...so in the summer pools are important (not so important of your upcoming trip is in January...as you might not swim)
2 - Feeling of the hotel - AKL is a deluxe hotel and when you are there it feels as such, now if you aren't going to be in your room or exploring the resort too much, this might not matter. My room at Coronado was really nice too...
3 - Resturants - AKL offers 3 table service, so there are options if you are spendning a lot of time at the resort itself. (Pepper Market at Coranado is my FAVORITE QS resturant!).
4 - Animals! My kids LOVE animals...while I never spring for the savannah view (I am cheap) there are still wonderful places to view animals, they offer viewing guides at the front desk...almost like having your own mini zoo.
5 - Transportation...distance to room, I have been fortunate at AKL to be in rooms close to the main entrance (this might change on our next trip) so we did not have to walk too far to the bus stop (AKL bus makes 2 stops Jambo House and Kidani village). Coronado is HUGE and has a a few bus stops...I am not sure how many, I cannot remember...
Our summer vacation is at AKL, and I plan on using the pool and spending time at the resort.
But 350...will pay for at least one dinner...maybe two!!
Happy planning, hope my 2 cents helps!