I have stayed at both resorts. POFQ for three nights, and Coronado multiple times, however in the Gran Destino Tower for all but one night. I should add that I stayed at POFQ prior to the room refurbishments a couple years ago.
The Tower at Coronado is amazing, and I would choose that hands down. However, since you're considering the preferred rooms, that makes it tougher. Here's how I'd rate different categories:
Rooms: POFQ over Coronado. They're newer, and I just like the theming better.
Size: POFQ over Coronado. It's much smaller.
Dining: Coronado over POFQ. Coronado has tons of good options for food. Three Bridges has great appetizers and drinks.
Pools: Coronado over POFQ. Even with using Riverside's pools, Coronado's main pool is beautiful and the best of the moderate resorts. I've never been to their quiet pools. However, Riverside's quiet pools are very nice, too.
Transportation: POFQ over Coronado. Coronado has many bus stops since it's a big resort. POFQ has one, but sometimes shares it with Riverside. POFQ also has a boat to Disney Springs, which is nice and relaxing.
Ambiance: POFQ over Coronado. If we were talking the Tower, I'd have a different answer, but outside of that I prefer POFQ. However, this is personal preference. Coronado is also a beautiful resort and feels more "adult" than POFQ. There are sometimes conventions at Coronado, so it may feel more "business-like" with people dressed professionally or wearing lanyard with badges to the events. If that's not your cup of tea, just keep in mind that could potentially be going on.
In these circumstances, I'd choose POFQ. However, my main criteria is ambiance and rooms. The rest doesn't matter as much to be. If the other categories matter more, that may affect your decision. Ultimately, you can't go wrong with either. They're both great resorts, and I'd recommend both of them.