Windows Azure vs Amazon EC2 vs Google App Engine
stackoverflow.com
stackoverflow.com
Also, Heroku is missing here - I would use that before Azure or GAE.
So I'd say they are at least somewhat comparable.
Out of curiosity, why? I recently made that comparison and came to the opposite conclusion, but based primarily on price.
GAE's 5million page views/month + 500MB storage for free is an unequaled price point. Basically, it's free until you get real traction.
I am language-agnostic for that particular project.
Nobody really cares that you have OS underneath all this, all people want to do is run some application on top of it. So all educational materials etc. instruct you to use VM as a foundation to run single app, not use it as a traditional server with multitude of services.
The end result is the same, except with EC2 et al you have to deal with traditional sysadmin tasks yourself.
Sure, I have to do some basic sysadmin maintenance, but I'm also not running Facebook here. Some basic monitoring and a few shell scripts and I have a reliable system that serves my clients needs.
I don't keep a close enough eye on App Engine to know about it but as someone who knows Azure and EC2 both of those are mis-represented here and that makes this next to useless imho.
Google responds with a "403 Forbidden".
Eh, not really, since GAE IP addresses were abused by spammers, mails go out but how many of them hit the inbox?