Personally speaking, I would prefer for folks at Percona to do that type of comparison. Percona provides additional deployment options to customers, as well as support and consulting for Amazon RDS [1]. I think they're in a better position to provide useful information to customers about the pros and cons, and help them make informed buying choices.

[1] https://www.percona.com/blog/2019/12/19/the-benefits-of-amaz...