This is one of the dumbest blog post I've seen in years.
How can you compare two databases in this way ? Each is running on different clouds with different hardware. Aurora isn't even using Provisioned IOPS (or is it we can't even tell). And in the Large Cluster scenario they have a staggering 30x GAE instances. Where is the cost comparison here ?
Anyway this is just SEO/Content Marketing fluff. Shouldn't be on here.