The International GS3's are all quad core with 1gb RAM, US GS3's are all dual core 1.5 S4 with 2gb of RAM - why? I have no idea... but I don't mind honestly, I think that 2gb of RAM will come in more handy than a quad core processor, especially when the S4 is great already. In 1+ year, maybe having the quad core will be more beneficial, but for now I'll take the RAM.