Quite right - you can't infer performance from pricing. We did some assessments of how well our applications ran on ARM and x86 based AWS instances, and quite

Quite right - you can't infer performance from pricing. We did some assessments of how well our applications ran on ARM and x86 based AWS instances, and quite simply it costs us less to serve the same quantities of end user traffic using Amazon's ARM instances compared to the x86 ones.