No benchmarks. No FLOPs. No comparison to commodity hardware. I hate the cloud servers. "9 is faster than 8 which is faster than 7 which is faster than 6, ..., which is faster than 1, which has unknown performance".
If you're interested in using them you should just bench them yourself.
As soon as they're publicly usable people benchmark them carefully. All currently available models have clear metrics.
Since it will be a virtual machine, its performance can be arbitrarily reduced.
Who exactly believes manufacturer benchmarks? Just go run your benchmarks yourself and pick. Price/performance is a workload thing.
You need to benchmark a new EC2 instance anyway. If it’s out of spec, burn it down and redeploy.