Cant see what makes this better than W3TC and the rest.
Image optimization means adding the size attribute?
Precaching requires dependency on the developers spider?
No mention of which CDNs are supported and how they handle push CDNs etc.
Defer JS loading? W3TC has async, defer and pure JS based loading. together with move script to footer and custom script locations.

Not sure what developer friendly actually means. There is no mention of how the devs can flush urls and cached items on their own etc. W3TC has extensive developer support integrated. Not well known but its there. (http://plugins.svn.wordpress.org/w3-total-cache/tags/0.9.4/inc/functions/plugin.php) It also support extensions, that is you can extend W3TC by writing your own functionality.