Their regular pricing page and their EC2 comparison page don't seem to match. One example - On the regular pricing page, XL has 32GB of memory, 760GB of disk, and costs $1.12 per hour. On their EC2 comparison page, in two places XL has 16GB of memory, 480GB of disk, and costs $0.64 per hour. In another place on that page it has 8GB of RAM and 240GB of disk and costs $0.64 per hour.