When determining what to use for development of my SaaS, I did a comparison of what you actually get from providers. The full article is at https://jan.rychter.com/enblog/cloud-server-cpu-performance-...

My takeaways were that many cloud provider offerings make no sense whatsoever, and that Xeon processors are mostly great if you are a cloud provider and want to offer overbooked "vCPUs".

I haven't tested those specific setups, but I strongly suspect a dedicated server from OVH is much faster than a 4.16xlarge from AWS.