My first instinct is that I like Pop better, but for just the icons themselves. Then look deeper, and there are many many many reasons why I like Pop better. They have a more innovative food court (read: more then just burgers and chicken fingers), they have icee's in the drink machines!, I love the lobby and all of it's decorations, the soundtrack that is played throughout the resort is awesome, I love the walking path along the lake, the bridge over the lake, and last, I think it's more centerally located then most resorts. The furthest drive is MK, AK is a decent distance, and Epcot, MGM, and DTD are all really close. In fact, you can see Spaceship Earth and Tower of Terror from the forth floors in some buildings.
And, if we want to get nitty-gritty here, Pop is actually cheaper then the all stars.....Since the All Stars are in a different county, their resort tax rate is (I think) 2.5% more then Pop's taxes. Just a neat fact.