I've stayed at both and they are both great for kids. I'm not a kid, but I like them too. Some will complain about the buses at the All Stars and I'm sure they've had some issues, but I've stayed at ASMo 6 times and I haven't had a problem with the buses at all. The movie theme is really cute and my DS loves it. ASMo and POP are very similar, in general. POP is bigger, and I found it noisier. With ASMo being older, I've come across a few looses handles on the sink and dripping bath tubs. On the other hand, the plumbing at POP is noisy and you can hear the toliets and showers from the other rooms. The food courts are comparable, but I prefer the selection at ASMo. They are both very convenient. The gift shop at POP is bigger. Either is a good choice. Hope you have a great stay, whichever you choose.