The program features are the same.
The $79 version (Subscription) will run for one year on your computer and you can run any new update or version (even betas) that comes out during that year. It is locked to the computer you install it on. After one year... subscribe again for $79!
Like the subscription, the $299 version is locked to the computer you install it on.
Like the subscription, it lets you run anything that comes out in the year after you activate.
Unlike the subscription, it doesn't expire after one year, you can continue to run whatever versions you got during the year. It won't run versions that come out after that year. This version is probably intended for people who need to know they will be able to run the A:M version they've been working with even if Hash were to disappear from the Earth and not able to offer a new subscription.
I believe you also get printed manuals (instead of PDFs) and a hard copy of the Extras DVD. Anyone know if I'm correct on that?
I will get the 299 deal I like that better than renewing all the time.