Notice the memory and file I/O, huge gulfs in performance. The focus of my comment though was about Amazon's restrictive leaky bucket CPU allocation scheme, you can burn through your allocation of high cpu use and then get throttled to 5% of peak use iirc for hours while this bucket refills. DO lets you use much more CPU comparatively.

True. For intermittent (less than 10% high CPU usage per period) use though, it's equivalent, and comes with other advantages.