What you get with SBI:
-A very long, not very effective tutorial
-A difficult to use keyword tool that runs over Wordtracker (that gives inferior results to the Google Adwords tool)
-A forum
-One domain name and hosted site. Additional domains and sites are another $300 per year per site (or $150 per year if you catch a sale), so 10 sites would cost you $1,500-$3,000 per year
-If you cancel your SBI subscription, you have to transfer your domain and figure out a way to export your content off SBI’s hosting (very difficult to do)

What you get with the Keyword Academy:
-Better tutorials than SBI that you can view/read for the introductory price of $1 and cancel afterward
-Instructions for how to set up an unlimited number of sites (10 of these sites would cost you $220 per year, or about 15-30% of what SBI would charge you
-Two link-building tools (SBI makes you go get your own backlinks)
-A keyword tool that runs circles around SBI’s (rolling out next week)
-A forum
-If you cancel your KWA subscription, your sites stay up and you don’t have to transfer your domains or export and repost your content elsewhere

And that’s aside from the philosophical differences between Courtney Tuttle and Ken Evoy. Briefly, Court is an SEO guy. Ken promotes social blogging and thinks SEO is on its way out.

Go ahead and try KWA for $1 the first month. See what you get and then tell me what you think.