If you just want to compare the database aspects that works. Once you get into other features that gets messier as functionality is split across components in different ways.

For example Prometheus vs InfluxDB is not a great comparison, whereas Prometheus+Alertmanager vs InfluxDB+Kapacitor is.

https://prometheus.io/docs/introduction/comparison/ has such a comparison, though it's a few months out of date.

[Disclaimer: Prometheus developer]