Typically clients requiring that much SSD-backed storage have performance targets and a very specific workload, so this affects options along with pricing. With that said, ballpark for what Amazon is advertising is comparable to our pricing, except with us you are _guaranteed_ the resources whereas they are using a multi-tenant environment (you're not using the only instance on their host and your I/O is influenced by everyone else using that host).

EDIT: Downvoted? Please offer your point of view.

EDIT2: Sample pricing offered in comment below.