They both have a lot to offer.
POFQ is smaller and easier to navigate. Has the DTD boat which is fantastic. It's a short walk to POR which is also a nice resort to walk around at. No matter where your room is it isn't far from the bus stop or food court.
Coronado is much larger. It has 4 bus stops so getting to a bus isn't too bad. The food court is fantastic. The pool (Dig Site) is pretty awesome.
Cons: POFQ: Only has one bus stop. I know that is listed as a pro above but sometimes you will have to stop at POR while going to the parks. We only had to do this 2 times on an 8 day stay so it isn't bad but still a slight con.
Coronado: Conventioneers.. When we stayed there was a convention going on and while we did not see them all the time there were still lines to get drinks in the refillable mugs and things like that. We could hear them some nights after we got back from the parks having a good time. You also have the walk to get your drinks in the refillable mugs. Unless you get lucky and get in a Casitas building you will be walking a fair distance just to get some soda, coffee, tea, etc.
All in all though our stays at both resorts were very enjoyable. We do not have children but if we did we would stay at POFQ due to it's smaller size and accessibility to the pool, food court, bus stop, etc.