> For example, you can make all these substitutions:

>c6g.2xlarge→c6g.4xlarge→m6g.4xlarge→r6g.4xlarge→r6gd.4xlarge

A long standing ticket in my personal project backlog is comparing different instance types performance. I'm not sure this equivalente is without caveats.

Anyhow, the reason "misprices" exist is because:

- Many AWS products are elastic but only allow one to choose a single instance type. So you need to guess the best instance for a workload and stick with it.

- No AWS product exposes a "Just give me the cheapest VM with x CPU and Y memory" API